Bug 989425: Remove unused variable 'DTLS_FINGERPRINT_LENGTH' from PeerConnectionImpl.cpp. r=mt
Bug 989336 - Silence 'uninteresting call' warning from mock object. r=dmitry.rojkov
Bug 989172 - Re-add sigaltstack to seccomp whitelist. r=kang

This reinstates the patch from bug 983518, which was unintentionally
dropped while merging with the reorganization in bug 985227.
Bug 988699: Remove custom NS_LOG_ADDREF / NS_LOG_RELEASE definitions in  CameraCommon.h. r=mikeh