Bug fix in nvptx and spir backends related to adding arguments to
node functions.

(CPU/GPU/SPIR) based on policy.
Support for scheduling per iteration included.
Further testing required.

Added parsing support for visc in,out,inout attributes. Commit ef703216 in previous llvm 3.4 based repo

Added the function to clone any function into a different typesHandiling two cases: (1) The caller is attempting to add data size argument after every pointer(2) The caller wants to add some extra arguments at the end

Fixed issue with visc's gitignore.

Fixed issue with llvm's gitignore.

Moved to the release_40 branch of llvm.

The SymVT stuff has not been moved yet, I removed it for now.
The test/VISC tests also have not been moved yet, so they may not
work.

Remove hard-wired compiler-rt from repo and add README

See merge request !1

Changes to pipeline example to work well with opencv 3.1. flann.hpp still has to be commented out from opencv.hpp to avoid compiling try catch throw with -fno-exceptions