testsuite: Move test pr117093.c into gcc.target/aarch64.

The test file pr117093.c failed on platforms other than aarch64, because
it uses arm_neon.h. We moved it into gcc.target/aarch64.

The patch was bootstrapped and tested on aarch64-linux-gnu and
x86_64-linux-gnu, no regression.
Committed as obvious.

Signed-off-by: Jennifer Schmitz <jschmitz@nvidia.com>

gcc/testsuite/
	PR tree-optimization/117093
	* gcc.dg/tree-ssa/pr117093.c: Move to gcc.target/aarch64.
	* gcc.target/aarch64/pr117093.c: New test.