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 'd7f78e88b5b2c65b8cef21fdcaae3278ec2ed083':
  Use sigemptyset to initialise signal mask as it is more portable. Referencing sa_restorer fails on MIPS