Fix c-c++-common/gomp/target-50.c test

Fix c-c++-common/gomp/target-50.c test

The expected scan dump output for this test will change after the
following patch is committed:

  https://gcc.gnu.org/pipermail/gcc-patches/2022-September/601558.html

But for now, this patch reverts to the old expected pattern so the test
passes. I will apply as obvious.

2022-09-15  Julian Brown  <julian@codesourcery.com>

gcc/testsuite/
	* c-c++-common/gomp/target-50.c: Modify scan pattern.