Fix two tests fail when OCL_SIMD_WIDTH=8.

Fix two tests fail when OCL_SIMD_WIDTH=8.

Add barrier for compiler_local_memory and compiler_local_memory_two_ptr,
otherwise tests may fail if work group size bigger than thread's simd size.

After add barrier, the test compiler_local_memory is same as
compiler_local_memory_barrier, so delete test compiler_local_memory.

Signed-off-by: Yang Rong <rong.r.yang@intel.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>