Rename buildNativeInputs -> nativeBuildInputs

Likewise for propagatedBuildNativeInputs, etc.  "buildNativeInputs"
sounds like an imperative rather than a noun phrase.

pkgs/misc/my-env/default.nix

@@ -63,8 +63,8 @@
 
 mkDerivation {
   # The setup.sh script from stdenv will expect the native build inputs in
-  # the buildNativeInputs environment variable.
-  buildNativeInputs = [ ] ++ buildInputs;
+  # the nativeBuildInputs environment variable.
+  nativeBuildInputs = [ ] ++ buildInputs;
   # Trick to bypass the stdenv usual change of propagatedBuildInputs => propagatedNativeBuildInputs
   propagatedBuildInputs2 = propagatedBuildInputs;
 
@@ -87,7 +87,7 @@ mkDerivation {
         -e 's@trap.*@@' \
         -i "$s"
     cat >> "$out/dev-envs/''${name/env-/}" << EOF
-      buildNativeInputs="$buildNativeInputs"
+      nativeBuildInputs="$nativeBuildInputs"
       propagatedBuildInputs="$propagatedBuildInputs2"
       # the setup-new script wants to write some data to a temp file.. so just let it do that and tidy up afterwards
       tmp="\$("${pkgs.coreutils}/bin/mktemp" -d)"