am b8d2233e: Merge "libc: tag missing functions in system headers." into gingerbread

Merge commit 'b8d2233e8abc30f33be7d7acc7f3ef6e6aabebac' into gingerbread-plus-aosp

* commit 'b8d2233e8abc30f33be7d7acc7f3ef6e6aabebac':
  libc: tag missing functions in system headers.