Introduce four new ARCH specific variables that CT_DoArchValues can set if they want:
- CT_ARCH_CC_CORE_EXTRA_CONFIG
- CT_ARCH_CC_EXTRA_CONFIG
- CT_ARCH_TARGET_CLFAGS
- CT_ARCH_TARGET_LDFLAGS
This will hopefully enable architectures to specify specific flags.
PowerPC will need them to introduce SPE (coming RSN).

/trunk/scripts/crosstool.sh | 2 2 0 0 ++
/trunk/scripts/functions | 4 2 2 0 ++--
/trunk/docs/overview.txt | 45 22 23 0 ++++++++++++++++++++++-----------------------
/trunk/config/target.in | 10 10 0 0 ++++++++++
4 files changed, 36 insertions(+), 25 deletions(-)

 diff -durN gcc-3.4.6.orig/gcc/config/mips/t-linux gcc-3.4.6/gcc/config/mips/t-linux

 --- gcc-3.4.6.orig/gcc/config/mips/t-linux	1970-01-01 01:00:00.000000000 +0100

 +++ gcc-3.4.6/gcc/config/mips/t-linux	2007-08-15 23:08:15.000000000 +0200

 @@ -0,0 +1,3 @@

 +# Compile crtbegin/end with xgot so it works for both

 +# normal and large GOTs.

 +CRTSTUFF_T_CFLAGS = -mxgot