Canonicalise CT_BUILD and CT_HOST:

- Not only will it give us full-qualified tuples, but it will also ensure
that they are valid tuples (in case of typo with user-provided tuples)
That's way better than trying to rewrite config.sub ourselves...
- use CT_BUILD_PREFIX and CT_BUILD_SUFFIX to call "gcc -dumpmachine"

/trunk/scripts/crosstool.sh | 29 7 22 0 +++++++----------------------
1 file changed, 7 insertions(+), 22 deletions(-)

 source config/global.in

 source config/target.in

 source config/toolchain.in

 source config/kernel.in

 source config/gmp_mpfr.in

 source config/binutils.in

 source config/cc.in

 source config/libc.in

 source config/tools.in

 source config/debug.in