Examine more than 1 frame for equivalent contexts in ThreadPlanStepOverRange
- searches frames beginning from the current frame, stops when an equivalent context is found
- not using GetStackFrameCount() for performance reasons
- fixes TestInlineStepping (clang/gcc buildbots)



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@190868 91177308-0d34-0410-b5e6-96231b3b80d8