MIPS32: Move code from RA to T9 in longjump

Do not use the return address. It should not be clobbered as we
may need it, e.g., for single-frame deopt.

This fixes following tests:
* 449-checker-bce
* 534-checker-bce-deoptimization
* 535-deopt-and-inlining

Change-Id: Ic94a2897c7336da094a8937ab1bc4a02a680de53
4 files changed