Increase max size of localloc and localloc_imm on amd64. (#15374)

We hit the following assert when doing full AOT of some assemblies:

wrong maximal instruction length of instruction localloc (expected 96, got 99)
Assertion: should not be reached at mono\mono\mini\mini-amd64.c:6801

Turns out that that size could be hit when a couple of things happens as part
of lowering OP_LOCALLOC and OP_LOCALLOC_IMM:

sreg1 is not RAX, RCX or RDI
dreg is not RAX, RCX or RDI
cfg->param_area is bigger than 127

Fix is to increase max size of the instruction, from 96 -> 120 (same as x86).

0 files changed, 0 insertions, 0 deletions