Remove -f and swap -s flag from nm call in verify_order.

Xcode 7.3 changed the flags for nm, but removing -f and swapping the
order of -s makes it work for both pre-7.3 and 7.3.

BUG=

Review URL: https://codereview.chromium.org/1773683002

Cr-Commit-Position: refs/heads/master@{#382570}
1 file changed