Add a C++ indexing test case, where we show the references of overloaded '+' plus signs.

Ok, this is a bit out of place since C++ support is way way off, but it was just too cool to not show it off :-)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@75601 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed