If compiling userland code with -std=c99, the current header produces an error. The content of this header originally is a kernel internal header, where asm() is acceptable. In a header visible to userland, this should be __asm__ instead. This change is done for all newly extracted headers by the extraction script, by https://review.source.android.com/19406, which was recently merged. Change-Id: I69332124a56577673a14e84cd7d9a4462c307724