stdenv: make -nostdinc work as intended

Right now we add glibc to search path also -nostdinc was provided,
which breaks projects providing their own gcc.

pkgs/applications/networking/browsers/firefox/common.nix

@@ -177,7 +177,8 @@ stdenv.mkDerivation ({
     # included we need to look in a few places.
     # TODO: generalize this process for other use-cases.
 
-    BINDGEN_CFLAGS="$(< ${stdenv.cc}/nix-support/libc-cflags) \
+    BINDGEN_CFLAGS="$(< ${stdenv.cc}/nix-support/libc-crt1-cflags) \
+      $(< ${stdenv.cc}/nix-support/libc-cflags) \
       $(< ${stdenv.cc}/nix-support/cc-cflags) \
       $(< ${stdenv.cc}/nix-support/libcxx-cxxflags) \
       ${lib.optionalString stdenv.cc.isClang "-idirafter ${stdenv.cc.cc}/lib/clang/${lib.getVersion stdenv.cc.cc}/include"} \