(Retry) Add a basic integration test for C++ smart pointers

Check that the debugger can pretty-print unique_ptr and shared_ptr when
passed as a function argument.

This was reverted in r339961 because of a bug in the version of lldb
installed on the public Green Dragon builders.

rdar://42314305

llvm-svn: 340189
GitOrigin-RevId: 651c2cdb4c04fcf3546a15d2fbb1a3296d840376
1 file changed