configure: prefer g-variants

For awk and make, we currently check the standard names as found on
a classic GNU-userland system, and then fallback to looking for the
g-named variants as found on a *BSD system.

But it happens that the usual name might also be available on a *BSD
system, so we should first check the g-variant.

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

CT_EXPERIMENTAL=y

CT_LOCAL_TARBALLS_DIR="${HOME}/src"

CT_SAVE_TARBALLS=y

CT_LOG_EXTRA=y

CT_ARCH_CPU="cpu32"

CT_ARCH_m68k=y

CT_ARCH_BINFMT_FLAT=y

CT_BINUTILS_V_2_20_1a=y

CT_CC_V_4_3_4=y

CT_LIBC_none=y

CT_GMP_V_4_3_2=y

CT_MPFR_V_2_4_2=y