Clean up external/spirv-llvm

Delete duplicated LLVM code, since it is already in external/llvm.
Moved llvm/Support/SPIRV.h from include to lib/SPIRV

Change-Id: I1daaf7a5be32434b424861d89214bfa75453bb4a
19816 files changed
tree: e1800c7c99cd825b70d4f758f7beb2237f5bb042
  1. lib/
  2. test/
  3. tools/
  4. LICENSE.TXT