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>

# Compute IA-64-specific values

CT_DoArchTupleValues() {

    # The architecture part of the tuple:

    CT_TARGET_ARCH="${CT_ARCH}"

}