libX11: Changes to 'master'

[Alan Coopersmith]

 configure.ac |   15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

New commits:
commit 5c1cde105db10df24d3c532f032cbc59050c7313
Author: Alan Coopersmith <alan.coopersmith at sun.com>
Date:   Fri Apr 17 22:14:47 2009 -0700

    Use AC_USE_SYSTEM_EXTENSIONS instead of hand-rolled check for _GNU_SOURCE
    
    Raises minimum autoconf version required to 2.60
    
    Signed-off-by: Alan Coopersmith <alan.coopersmith at sun.com>