Get rid of CT_LIBC_FILE, remove useless CT_MakeAbsolutePath.

CT_LIBC_FILE:
- that one was not easy, as it had sneaked into CT_ExtractAndPatch
- which in turn made CT_ExtractAndPatch have references to C library addons
- which in turn relieved the C library _extract functions from doing their own job
- which in turn imposed some nasty tricks in CT_ExtractAndPatch
- which in turn made life easier for the DUMA _get and _extract functions
- which unveiled some bizare behavior for pushd and popd:
- if using smthg ike: 'pushd foo |bar':
- the directory is *neither* changed
- *nor* is it pushed onto the stack
- which made popd fail

CT_MakeAbsolutePath:
- used only to make CT_LOCAL_TARBALLS_DIR canonical
- which is ((almost) useless:
- hopefully, the user entered a full path already
- if it's not the case, too bad...

/trunk/scripts/build/debug/200-duma.sh | 5 1 4 0 +--
/trunk/scripts/build/libc/glibc.sh | 61 32 29 0 +++++++++++++++++---------------
/trunk/scripts/build/libc/uClibc.sh | 16 10 6 0 +++++---
/trunk/scripts/build/libc/eglibc.sh | 48 26 22 0 ++++++++++++++-----------
/trunk/scripts/crosstool.sh | 8 0 8 0 ----
/trunk/scripts/functions | 77 15 62 0 ++++++++--------------------------------
6 files changed, 84 insertions(+), 131 deletions(-)

 # Compute x86-specific values

 # This one really need a little love! :-(

 CT_DoArchTupleValues() {

     # The architecture part of the tuple:

     arch="${CT_ARCH_ARCH}"

     [ -z "${arch}" ] && arch="${CT_ARCH_TUNE}"

     case "${arch}" in

         nocona|athlon*64|k8|athlon-fx|opteron)

             CT_DoError "Architecture is x86 (32-bit) but selected processor is \"${arch}\" (64-bit)";;

         "")                           CT_TARGET_ARCH=i386;;

         i386|i486|i586|i686)          CT_TARGET_ARCH="${arch}";;

         winchip*)                     CT_TARGET_ARCH=i486;;

         pentium|pentium-mmx|c3*)      CT_TARGET_ARCH=i586;;

         pentiumpro|pentium*|athlon*)  CT_TARGET_ARCH=i686;;

         *)                            CT_TARGET_ARCH=i586;;

     esac

     # The kernel ARCH:

     CT_KERNEL_ARCH=i386

 }