Enable parallel building of gcc, glibc, gmp, mpfr, coreutils, perl, git, and qt4.

svn path=/nixpkgs/branches/stdenv-updates/; revision=22400

pkgs/development/libraries/gmp/4.3.1.nix

@@ -16,6 +16,8 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
+  enableParallelBuilding = true;
+
   meta = {
     description = "A free library for arbitrary precision arithmetic, operating on signed integers, rational numbers, and floating point numbers";
     homepage = http://gmplib.org/;

pkgs/development/libraries/gmp/default.nix

@@ -18,6 +18,8 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
+  enableParallelBuilding = true;
+
   meta = {
     description = "GMP, the GNU multiple precision arithmetic library";