This patch bumps the libgm2 version to 19.0.0 reflecting
time related fixes, changes to builtins.def and the
commencement of gcc stage3.

libgm2/ChangeLog:

	* configure: Regenerate.
	* configure.ac:(libtool_VERSION): Bump to 19:0:0.

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>