MIPS64: Fix art_quick_instrumentation_entry

Load address of art_quick_instrumentation_exit before $gp register
is restored in RESTORE_SAVE_REFS_AND_ARGS_FRAME.

This fixes a lot of tests like:
* 099-vmdebug
* 304-method-tracing
* 545-tracing-and-jit
* 802-deoptimization
* 988-method-trace
and many others as well as tests with --trace option.

Test: ./testrunner --optimizing --target in QEMU
Test: ./testrunner --optimizing --target --trace in QEMU
Change-Id: I1c45c4a04a45ebe00cb63fbde547367be6de62cf