Beef up the testing of our 'ld' invocation on linux to cover static
linking. About to fix a bug here and there was no good test case.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176427 91177308-0d34-0410-b5e6-96231b3b80d8
Perform non-overload placeholder conversions on the operands
to a subscript operator.

rdar://13332183

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176428 91177308-0d34-0410-b5e6-96231b3b80d8