am 914528cd: am 223ddfcf: Merge "libc: Add missing pipe2() declaration and implementation." into gingerbread

Merge commit '914528cdc90dced0c07055d4d986e68adc8da60c'

* commit '914528cdc90dced0c07055d4d986e68adc8da60c':
  libc: Add missing pipe2() declaration and implementation.