autoconf-archive: add backport patch to fix gl detection

autoconf-archive: add backport patch to fix gl detection

Detecting opengl using autoconf-archive currently fails:
| aclocal: warning: couldn't open directory 'm4': No such file or directory
| configure.ac:306: error: _AX_CHECK_GL_MANUAL_LIBS_GENERIC: argument must not be empty
| ../sources/autoconf-2.72/lib/m4sugar/m4sh.m4:690: _AS_IF_ELSE is expanded from...
| ../sources/autoconf-2.72/lib/m4sugar/m4sh.m4:697: AS_IF is expanded from...
| /home/flk/poky/build/tmp/work/corei7-64-poky-linux/cava/0.10.4/recipe-sysroot-native/usr/share/aclocal/ax_check_gl.m4:187: _AX_CHECK_GL_MANUAL_LIBS_GENERIC is expanded from...
| ../sources/autoconf-2.72/lib/m4sugar/m4sh.m4:595: AS_CASE is expanded from...
| /home/flk/poky/build/tmp/work/corei7-64-poky-linux/cava/0.10.4/recipe-sysroot-native/usr/share/aclocal/ax_check_gl.m4:253: AX_CHECK_GL is expanded from...
| ../sources/autoconf-2.72/lib/m4sugar/m4sh.m4:697: AS_IF is expanded from...
| ../sources/autoconf-2.72/lib/m4sugar/m4sh.m4:697: AS_IF is expanded from...
| configure.ac:306: the top level
| autom4te: error: m4 failed with exit status: 1

This issue has already been fixed upstream, but there has been no new release since then.

Signed-off-by: Markus Volk <f_l_k@t-online.de>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>