m4: Update ltmain.sh and m4 files.
* build-aux/ltmain.sh: Update from libgcrypt master. * m4/gpg-error.m4: Update from libgcrypt master. * m4/libtool.m4, m4/ltoptions.m4, m4/ltsugar.m4: Likewise. * m4/ltversion.m4, m4/lt~obsolete.m4, m4/noexecstack.m4: Likewise.
This allows build with newer libgpg-error installation with no
gpg-error-config.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>