PR modula2/111627 Excess test fails with a case-preserving-case-insensitive source...

PR modula2/111627 Excess test fails with a case-preserving-case-insensitive source tree

This patch renames gm2 testsuite modules whose names conflict with library
modules.  The conflict is not seen on case preserving case sensitive file
systems.

gcc/testsuite/ChangeLog:

	PR modula2/111627
	* gm2/pim/pass/stdio.mod: Moved to...
	* gm2/pim/pass/teststdio.mod: ...here.
	* gm2/pim/run/pass/builtins.mod: Moved to...
	* gm2/pim/run/pass/testbuiltins.mod: ...here.
	* gm2/pim/run/pass/math.mod: Moved to...
	* gm2/pim/run/pass/testmath.mod: ...here.
	* gm2/pim/run/pass/math2.mod: Moved to...
	* gm2/pim/run/pass/testmath2.mod: ...here.

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