When a function is inlined, each instance is optimized in their own
inlining context. This can produce different remarks all pointing to
the same source line.
This adds a new column on the source view to display the inlining
context.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286537 91177308-0d34-0410-b5e6-96231b3b80d8