Adding a required option to uclibc for util-linux-ng (the git master version, not that of nixpkgs, which still has bugs) to link well with uclibc.

svn path=/nixpkgs/branches/stdenv-updates/; revision=18852

pkgs/os-specific/linux/uclibc/default.nix

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       -e 's@^DEVEL_PREFIX.*@DEVEL_PREFIX="/"@' \
       -e 's@.*UCLIBC_HAS_WCHAR.*@UCLIBC_HAS_WCHAR=y@' \
       -e 's@.*DO_C99_MATH.*@DO_C99_MATH=y@' \
+      -e 's@.*UCLIBC_HAS_PROGRAM_INVOCATION_NAME.*@UCLIBC_HAS_PROGRAM_INVOCATION_NAME=y@' \
       ${configArmEABI} \
       ${configBigEndian} \
       -i .config