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(-)

# Overall toolchain configuration: paths, jobs, etc...

menu "Paths and misc options"

source "config/global/ct-behave.in"

source "config/global/paths.in"

source "config/global/download.in"

source "config/global/extract.in"

source "config/global/build-behave.in"

source "config/global/logging.in"

endmenu