Bug 1014299 - Add times() to seccomp whitelist. r=kang, a=1.4+

This system call seems to be used by some versions of the Qualcomm Adreno
graphics drivers when we run WebGL apps.
Bug 990467 - Part 1: Refactor: Extract function of adding new voice call. r=hsinyi, a=Preeti
Bug 990467 - Part 2: Add pending outgoing call. r=hsinyi, a=Preeti
Bug 990467 - Part 3: DOM: Re-order code to avoid multi-thread issue. r=hsinyi, a=Preeti
Bug 993255 - Part 1: Refactor: Extract removeVoiceCall. r=hsinyi, a=Preeti
Bug 993255 - Part 2: Hangup pending outgoing call. r=hsinyi, a=Preeti
Bug 993255 - Part 3: Fix related test case. r=hsinyi, a=Preeti
Bug 993255 - Part 4: Fix hang up pending outgoing call. r=hsinyi, a=Preeti