Once code completion has completed, pass a "completion context" on to

Once code completion has completed, pass a "completion context" on to
the code-completion consumer. The consumer can use this information to
augument, filter, or display the code-completion results.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110858 91177308-0d34-0410-b5e6-96231b3b80d8