gcc, binutils: Get rid of 32-bit ARM configure flag exception

Now that we do `--enable-targes=all`, there is no risk of missing the
needed emulation.

This reverts commit ebc9b161cd.
This reverts commit 88efc22b44.

pkgs/development/compilers/gcc/4.5/default.nix

@@ -256,11 +256,7 @@ stdenv.mkDerivation ({
     ;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms =
+  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
-    # TODO(@Ericson2314): Figure out what's going wrong with Arm
-    if hostPlatform == targetPlatform && targetPlatform.isArm
-    then []
-    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/4.8/default.nix

@@ -298,11 +298,7 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms =
+  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
-    # TODO(@Ericson2314): Figure out what's going wrong with Arm
-    if hostPlatform == targetPlatform && targetPlatform.isArm
-    then []
-    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/4.9/default.nix

@@ -307,11 +307,7 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms =
+  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
-    # TODO(@Ericson2314): Figure out what's going wrong with Arm
-    if hostPlatform == targetPlatform && targetPlatform.isArm
-    then []
-    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/5/default.nix

@@ -316,11 +316,7 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms =
+  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
-    # TODO(@Ericson2314): Figure out what's going wrong with Arm
-    if hostPlatform == targetPlatform && targetPlatform.isArm
-    then []
-    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/6/default.nix

@@ -319,11 +319,7 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms =
+  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
-    # TODO(@Ericson2314): Figure out what's going wrong with Arm
-    if hostPlatform == targetPlatform && targetPlatform.isArm
-    then []
-    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/7/default.nix

@@ -312,11 +312,7 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms =
+  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
-    # TODO(@Ericson2314): Figure out what's going wrong with Arm
-    if hostPlatform == targetPlatform && targetPlatform.isArm
-    then []
-    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/compilers/gcc/snapshot/default.nix

@@ -299,11 +299,7 @@ stdenv.mkDerivation ({
   dontDisableStatic = true;
 
   # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms =
+  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
-    # TODO(@Ericson2314): Figure out what's going wrong with Arm
-    if hostPlatform == targetPlatform && targetPlatform.isArm
-    then []
-    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags =
     # Basic dependencies

pkgs/development/tools/misc/binutils/default.nix

@@ -91,11 +91,7 @@ stdenv.mkDerivation rec {
     else "-static-libgcc";
 
   # TODO(@Ericson2314): Always pass "--target" and always targetPrefix.
-  configurePlatforms =
+  configurePlatforms = [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
-    # TODO(@Ericson2314): Figure out what's going wrong with Arm
-    if hostPlatform == targetPlatform && targetPlatform.isArm
-    then []
-    else [ "build" "host" ] ++ stdenv.lib.optional (targetPlatform != hostPlatform) "target";
 
   configureFlags = [
     "--enable-targets=all" "--enable-64-bit-bfd"