refine .type ...,%function

refine .type ...,%function

.type is an ELF thing, not understood by Mach.
So do the same sort of #define trick we do for HIDDEN.

This expands the use of .type ...,%function to everywhere
that supports it, rather than just where we needed it.
Feels cozier this way.

CQ_INCLUDE_TRYBOTS=skia.primary:Build-Mac-Clang-arm-Debug-iOS,Build-Mac-Clang-arm-Release-iOS,Test-ChromeOS-Clang-Chromebook_C100p-GPU-MaliT764-arm-Release,Test-ChromeOS-Clang-Chromebook_C100p-GPU-MaliT764-arm-Debug

Change-Id: Iaff01b0f3f70ceedf743d7a553915792cdd7e569
Reviewed-on: https://skia-review.googlesource.com/13469
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Herb Derby <herb@google.com>