Replace -march= with -mfeature toggles.

This gives us parity with Chromium (https://crrev.com/c/5046492)
and is also more similar to the original implementation, which
enabled exactly these sets of flags.

Bug: b/310927123
Change-Id: Ie9261b01fc88ae4e365fb0b0fd6d33997cdde007
Reviewed-on: https://skia-review.googlesource.com/c/skcms/+/781517
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
4 files changed