[PATCH] Introduce AnnobinLLVMCommon.h

[Nick Clifton]

Hi Tulio,

> Move shared code between clang-plugin and llvm-plugin to a new header
> called AnnobinLLVMCommon.h.
> This is just an initial version with the most obvious functions and more
> code is expected to be migrated in future commits.
> 
> This migration also fixes a few clang-tidy issues in both files.
Fabulous.  Patch approved and applied.

Cheers
   Nick