Reduce runtime dependencies to the minimum

• Add a hack to prevent USE_GCC to add a useless runtime dependency
• Remove gettext dependency and teach the configure script that --disable-nls really means I do not want nls at all
• Teach the Makefiles that if I do not want nls then it is really not need to try to link anyway to libintl

Requested by: gehan
Approved by: kmoore (maintainer)