Disable tower socket runtest (gm2-simple-execute).

Disable tower socket runtest (gm2-simple-execute).

The projects-pim-run-pass-tower.exp test blocks indefinitely
on some platforms.  This patch disables it for now - it should
be enabled once a cross platform fix for RTint.mod is found.
Even disable the trivial execution test.

gcc/testsuite/ChangeLog:

	* gm2/projects/pim/run/pass/tower/projects-pim-run-pass-tower.exp:
	Also add conditional to gm2-simple-execute.

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