Compiler options for compiling faiss updated:
- for common objs using -mss4.2 for tunning, remove -mf16c, which may
need newer CPU.
- for avx2 objs using -mavx2 and -mf16c
- for avx512 objs using -mavx512* and -mf16c
Issue: #12335
Signed-off-by: Ji Bin <matrixji@live.com>