BB 41459: WebRTC fails to build under mingw (Part 5)

dom/media/webrtc/libwebrtcglue/VideoConduit.cpp

dom/media/webrtc/sdp/RsdparsaSdpAttributeList.cpp

dom/media/webrtc/transport/nrinterfaceprioritizer.cpp

dom/media/webrtc/transport/sigslot.h

dom/media/webrtc/transport/test/ice_unittest.cpp

...a/webrtc/transport/third_party/nICEr/src/net/local_addr.c

...a/webrtc/transport/third_party/nICEr/src/net/local_addr.h

...brtc/transport/third_party/nICEr/src/stun/addrs-netlink.c

...webrtc/transport/third_party/nICEr/src/stun/addrs-win32.c

...media/webrtc/transport/third_party/nICEr/src/stun/addrs.c

...dia/webrtc/transport/third_party/nrappkit/src/log/r_log.c

...tc/transport/third_party/nrappkit/src/registry/registry.c