Bug 838803 - Remove HAVE_STDCALL to work around clang bug. r=glandium

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extra : rebase_source : e1cdb524a4f7f0742f2051e5915e5e21db4c0423
Bug 893973 Check if the keydown event received view actually has focus and separate the MOZ_CRASH() for each case r=smichaud
Simplify xpcshell ini files - Bug 894115 - xpcshell ini file confusion. r=bbondy
Part 1. use custom XREExeF and UpdRootD - Bug 889183 - mozapps/update xpcshell tests cannot be run concurrently. r=bbondy
Part 2. add run-sequentially to xpcshell ini files for tests that can't run in parallel yet - Bug 889183 - mozapps/update xpcshell tests cannot be run concurrently. r=mihneadb
Test followup fix for Bug 889183 - mozapps/update xpcshell tests cannot be run concurrently. r=me