bcc changes for fp16

Bug: 7342860

Add fp16-specific attributes ("fp16" for ARM and "f16c" for x86) to the
compiler feature string.  The attribute is not added on host versions of
the tools.

Change-Id: I7f0783d7228dccc5828c8d5900fceeec04b5a7c2
(cherry picked from commit 70e3dcff9f0450b13f8ccb8db3fba76653993e35)
1 file changed