Allow selecting 'latest' snapshot, as well as 'specific' date snapshot for glibc.
Update uClibc config to commonalise some help.

/trunk/scripts/build/libc_glibc.sh | 22 20 2 0 ++++++++++++++++++++--
/trunk/config/libc/glibc.in | 12 12 0 0 ++++++++++++
/trunk/config/libc/uClibc.in | 12 4 8 0 ++++--------
/trunk/config/libc.in | 13 13 0 0 +++++++++++++
4 files changed, 49 insertions(+), 10 deletions(-)

# MIPS specific config options

config ARCH_mips

    select ARCH_SUPPORTS_BOTH_ENDIAN

    select ARCH_DEFAULT_BE

    select ARCH_SUPPORT_ARCH

    select ARCH_SUPPORT_ABI

    select ARCH_SUPPORT_TUNE

    help

      The MIPS architecture, as defined by:

        http://www.mips.com/