Defines starting with `i' in src/cpu/jit

• IMM src/cpu/jit/compemu.h:239
• IMMS src/cpu/jit/compemu.h:238
• INDIVIDUAL_INST src/cpu/jit/compemu.h:63
• INMEM src/cpu/jit/compemu.h:114
• isaddx src/cpu/jit/gencomp.c:24
• ISCONST src/cpu/jit/compemu.h:118
• is_const_jump src/cpu/jit/gencomp.c:23
• isjump src/cpu/jit/gencomp.c:22