am d3f0638a: libc: fix typo in waitid() declaration.

Merge commit 'd3f0638aeec0b1daf4d3347386a5e441d5a4bcc4' into gingerbread-plus-aosp

* commit 'd3f0638aeec0b1daf4d3347386a5e441d5a4bcc4':
  libc: fix typo in waitid() declaration.