RISC-V: update match_func of cm.jt/cm.jalt to spec 1.0.
Created by: linsinan1995
as mentioned at https://github.com/openhwgroup/corev-binutils-gdb/pull/65#issuecomment-1415356658, update the match_func field of cm.jt/cm.jalt.
with this patch, GAS can correctly accept cm.jalt
with an index between 32 to 63.