Bug 840577 - Fix ANGLE cross compilation on case sensitive OSes, relanded

--HG--
extra : rebase_source : 5664ebb57dd0b60d352ce72f3f7b665e6d847189
Bug 857845 - Remove Trampoline* assemblies from Makefile.in r=jdemooij

--HG--
extra : rebase_source : 3951144337f30d96b7105431703c3b514fcdb7c1
Bug 857845 - More StackFrame cleanup r=luke

--HG--
extra : rebase_source : 36e325eb2df7e5916acc6ca6a42e3d4ddd168d46