Update notes for submitted changes

* Remove the -O1 WAR for SROA.cpp compilation.
Update notes for submitted changes

* Update to LLVM 3.5a.
Update notes for submitted changes

* CleanSpec for clang 3.5
Update notes for submitted changes

* Don't try to use Clang on Windows yet.
Update notes for submitted changes

* We need to build the ARM components for AArch64 as well.