Use tcg_set_insn_param() instead of directly accessing internal
tcg data structures to update an insn param.
Backports commit 25caa94c4a26daaab1e65c6d887e2972aeb5749e from qemu
This is improved type checking for the translators -- it's no longer
possible to accidentally swap arguments to the branch functions.
Note that the code generating backends still manipulate labels as int.
With notable exceptions, the scope of the change is just a few lines
for each target, so it's not worth building extra machinery to do this
change in per-target increments.
Backports commit 42a268c241183877192c376d03bd9b6d527407c7 from qemu
