packages using the system wide libtool script compile.
- Add gcc-c++ gcc-fortran and gcc-objc to buildrequires so that
packages using the system wide libtool script compile.
- Add a rpmlintrc to shut up rpmlint on most warnings.
OBS-URL: https://build.opensuse.org/package/show/Base:System/libtool?expand=0&rev=31
