cc/gcc: shuffle config knobs

It makes sense to have all library-related config knobs in
the same place; and it makes sense to have all other misc
config knobs in the same other place.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

reporter_name="Nye Liu"

reporter_url="http://sourceware.org/ml/crossgcc/2008-10/msg00046.html"

reporter_comment=""