Disable the reference result for the aarch64_neon_intrinsics.c test since clang is buggy.

Benign changes in -O0 codegen is causing the known non-deterministic failure
modes because clang is doing the wrong thing w.r.t saturating intrinsics.

Until someone goes and fixes the underlying issue, this test is only useful
as a compile-time test.

Ref: D59615 and b5e87c9ef2243ecd65e0ef87a1bf303c0c26db04 discussions.
1 file changed