testsuite: arm: Use effective-target for memset-inline* tests

testsuite: arm: Use effective-target for memset-inline* tests

Split tests into 2 parts:
- The first part checkes the assmbler generated.
- The second part does the run test and this part now requires
  effective-target arm_neon_hw.

gcc/testsuite/ChangeLog:

	* gcc.target/arm/memset-inline-4.c: Only check assembler output.
	* gcc.target/arm/memset-inline-5.c: Likewise.
	* gcc.target/arm/memset-inline-6.c: Likewise.
	* gcc.target/arm/memset-inline-8.c: Likewise.
	* gcc.target/arm/memset-inline-9.c: Likewise.
	* gcc.target/arm/memset-inline-4-exe.c: New test.
	* gcc.target/arm/memset-inline-5-exe.c: Likewise.
	* gcc.target/arm/memset-inline-6-exe.c: Likewise.
	* gcc.target/arm/memset-inline-8-exe.c: Likewise.
	* gcc.target/arm/memset-inline-9-exe.c: Likewise.

Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>