[MachineOutliner][X86] Use TAILJMPd64 instead of JMP_1 for TailCall construction

The machine verifier asserts with:

Assertion failed: (isMBB() && "Wrong MachineOperand accessor"), function getMBB, file ../include/llvm/CodeGen/MachineOperand.h, line 542.

It calls analyzeBranch which tries to call getMBB if the opcode is
JMP_1, but in this case we do:

JMP_1 @OUTLINED_FUNCTION

I believe we have to use TAILJMPd64 instead of JMP_1 since JMP_1 is used
with brtarget8.

Differential Revision: https://reviews.llvm.org/D49299

llvm-svn: 338237