treewide: remove paxutils from stdenv

More then one year ago we removed grsecurity kernels from nixpkgs:
https://github.com/NixOS/nixpkgs/pull/25277

This removes now also paxutils from stdenv.

pkgs/development/compilers/swift/default.nix

@@ -27,7 +27,6 @@
 , git
 , libgit2
 , fetchFromGitHub
-, paxctl
 , findutils
 , makeWrapper
 , gnumake
@@ -150,7 +149,7 @@ stdenv.mkDerivation rec {
     findutils
     makeWrapper
     gnumake
-  ] ++ stdenv.lib.optional stdenv.needsPax paxctl;
+  ];
 
   # TODO: Revisit what's propagated and how
   propagatedBuildInputs = [
@@ -218,9 +217,6 @@ stdenv.mkDerivation rec {
     substituteInPlace swift/utils/build-script-impl \
       --replace '/usr/include/c++' "${clang.cc.gcc}/include/c++"
     patch -p1 -d swift -i ${./patches/glibc-arch-headers.patch}
-  '' + stdenv.lib.optionalString stdenv.needsPax ''
-    patch -p1 -d swift -i ${./patches/build-script-pax.patch}
-  '' + ''
     patch -p1 -d swift -i ${./patches/0001-build-presets-linux-don-t-require-using-Ninja.patch}
     patch -p1 -d swift -i ${./patches/0002-build-presets-linux-allow-custom-install-prefix.patch}
     patch -p1 -d swift -i ${./patches/0004-build-presets-linux-plumb-extra-cmake-options.patch}
@@ -266,9 +262,6 @@ stdenv.mkDerivation rec {
     tar xf $INSTALLABLE_PACKAGE -C $out --strip-components=3 $PREFIX
     find $out -type d -empty -delete
 
-    paxmark pmr $out/bin/swift
-    paxmark pmr $out/bin/*
-
     # TODO: Use wrappers to get these on the PATH for swift tools, instead
     ln -s ${clang}/bin/* $out/bin/
     ln -s ${targetPackages.stdenv.cc.bintools.bintools_bin}/bin/ar $out/bin/ar

pkgs/development/compilers/swift/patches/build-script-pax.patch

@@ -1,33 +0,0 @@
---- swift/utils/build-script-impl	2017-01-23 12:47:20.401326309 -0600
-+++ swift-pax/utils/build-script-impl	2017-01-23 13:24:10.339366996 -0600
-@@ -1837,6 +1837,17 @@ function set_lldb_xcodebuild_options() {
-     fi
- }
- 
-+## XXX: Taken from nixpkgs /pkgs/stdenv/generic/setup.sh
-+isELF() {
-+    local fn="$1"
-+    local fd
-+    local magic
-+    exec {fd}< "$fn"
-+    read -n 4 -u $fd magic
-+    exec {fd}<&-
-+    if [[ "$magic" =~ ELF ]]; then return 0; else return 1; fi
-+}
-+
- #
- # Configure and build each product
- #
-@@ -2735,6 +2746,12 @@ for host in "${ALL_HOSTS[@]}"; do
-             fi
- 
-             call "${CMAKE_BUILD[@]}" "${build_dir}" $(cmake_config_opt ${product}) -- "${BUILD_ARGS[@]}" ${build_targets[@]}
-+            
-+						while IFS= read -r -d $'\0' i; do
-+								if ! isELF "$i"; then continue; fi
-+								echo "setting pax flags on $i"
-+								paxctl -czexm "$i" || true
-+						done < <(find "${build_dir}" -executable -type f -wholename "*/bin/*" -print0)
-         fi
-     done
- done