[code completion] Complete ObjC methods in @implementation without leading
'-'/'+' prefix

rdar://12040840

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@316458 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 53710bdec511dfcfb69ee4d234b7f579b4955101)
4 files changed