Set correct .type directive for asm functions.

This is required per binutil manual.
https://sourceware.org/binutils/docs/as/Type.html#Type

Otherwise, runtime SEGV_MAPERR if linked by GNU bfd linker.

BUG=b/20218337
R=wzhong@chromium.org

Review URL: https://webrtc-codereview.appspot.com/47059004

Patch from Wei Zhong <wzhong@chromium.org>.

Cr-Commit-Position: refs/heads/master@{#9106}
1 file changed