[libclang] Since an objc extension semantically continues the interface of the class
don't use unique USRs for them, otherwise we fail to associate @implementation methods
with the methods in extensions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@142361 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed