Add --disable-static-c++-link-check option [BZ #31412]

The current minimum GCC version of glibc build is GCC 6.2 or newer. But
building i686 glibc with GCC 6.4 on Fedora 40 failed since the C++ header
files couldn't be found which was caused by the static C++ link check
failure due to missing __divmoddi4 which was referenced in i686 libc.a
and added to GCC 7.  Add --disable-static-c++-link-check configure option
to disable the static C++ link test.  The newly built i686 libc.a can be
used by GCC 6.4 to create static C++ tests.  This fixes BZ #31412.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>