Merge pull request #283460 from rodarima/fix-pkgs-static-gcc-march

pkgsStatic: Pass hostPlatform.gcc attribute

pkgs/top-level/stage.nix

···
           if stdenv.isLinux
           then makeMuslParsedPlatform stdenv.hostPlatform.parsed
           else stdenv.hostPlatform.parsed;
-      } // lib.optionalAttrs (stdenv.hostPlatform.system == "powerpc64-linux") {
-        gcc.abi = "elfv2";
+        gcc = lib.optionalAttrs (stdenv.hostPlatform.system == "powerpc64-linux") { abi = "elfv2"; } //
+          stdenv.hostPlatform.gcc or {};
       };
     });