am 7b0ea426: am d7f78e88: am e3bdaeb6: am 2765e4fb: Merge "Use sigemptyset to initialise signal mask as it is more portable. Referencing sa_restorer fails on MIPS"

* commit '7b0ea4262b2ec5781faeca67762f03af3fb1c71f':
  Use sigemptyset to initialise signal mask as it is more portable. Referencing sa_restorer fails on MIPS