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

* commit 'e3bdaeb603ab7ac941b35b41856c6b8ebf47c6bb':
  Use sigemptyset to initialise signal mask as it is more portable. Referencing sa_restorer fails on MIPS