Remove static global GCNames from Function.cpp and move it to the Context

This remove the need for locking when deleting a function.

Differential Revision: http://reviews.llvm.org/D15988

From: Mehdi Amini <mehdi.amini@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257139 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed