cc-wrapper: fixup branch interactions

c0599fdd61 and changes on closure-size didn't go well together.

pkgs/build-support/cc-wrapper/cc-wrapper.sh

@@ -1,7 +1,7 @@
 #! @shell@ -e
 path_backup="$PATH"
-if [ -n "@coreutils@" ]; then
-  PATH="@coreutils@/bin:@gnugrep@/bin"
+if [ -n "@coreutils_bin@" ]; then
+  PATH="@coreutils_bin@/bin:@gnugrep_bin@/bin"
 fi
 
 if [ -n "$NIX_CC_WRAPPER_START_HOOK" ]; then

pkgs/build-support/cc-wrapper/default.nix

@@ -44,7 +44,7 @@ stdenv.mkDerivation {
   preferLocalBuild = true;
 
   inherit cc shell libc_bin libc_dev libc_lib binutils_bin coreutils_bin;
-  gnugrep = if nativeTools then "" else gnugrep;
+  gnugrep_bin = if nativeTools then "" else gnugrep;
 
   passthru = { inherit libc nativeTools nativeLibc nativePrefix isGNU isClang; };
 

pkgs/build-support/cc-wrapper/gnat-wrapper.sh

@@ -1,7 +1,7 @@
 #! @shell@ -e
 path_backup="$PATH"
-if [ -n "@coreutils@" ]; then
-  PATH="@coreutils@/bin"
+if [ -n "@coreutils_bin@" ]; then
+  PATH="@coreutils_bin@/bin"
 fi
 
 if [ -n "$NIX_GNAT_WRAPPER_START_HOOK" ]; then

pkgs/build-support/cc-wrapper/ld-wrapper.sh

@@ -1,7 +1,7 @@
 #! @shell@ -e
 path_backup="$PATH"
-if [ -n "@coreutils@" ]; then
-  PATH="@coreutils@/bin"
+if [ -n "@coreutils_bin@" ]; then
+  PATH="@coreutils_bin@/bin"
 fi
 
 if [ -n "$NIX_LD_WRAPPER_START_HOOK" ]; then