Function opFlipInPlaceTest

\brief Trace a boolean value to a set of PcodeOps that can be changed to flip the boolean value The boolean Varnode is either the output of the given PcodeOp or the first input if the PcodeOp is a CBRANCH. The list of ops that need flipping is returned in an array \param op is the given PcodeOp \param fliplist is the array that will hold the ops to flip \return 0 if the change normalizes, 1 if th