meson: Enable SSE4.1 optimizations

This patch checks for an and then enables sse4.1 optimizations if the
host machine will be x86/x86_64.

v2: - Don't compile code, it's unnecessary since we require a compiler
      which always has SSE4.1 (Matt)
v3: - x64 -> x86_64 (Matt)

Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
2 files changed