* gnu/packages/gnuzilla.scm (nss): Update to 3.21. [arguments]: In configure phase, setenv CC=gcc. * gnu/packages/patches/nss-pkgconfig.patch: Adapt to NSS 3.21.
* gnu/packages/patches/nss-pkgconfig.patch (nss-config): Include -L$libdir in output of "nss-config --libs".
* gnu/packages/patches/nss-pkgconfig.patch: New file. * gnu-system.scm (dist_patch_DATA): Add it. * gnu/packages/gnuzilla.scm (nss): New variable.