Fix block labeling in JIT debug output * jit-ir.cc (jit_block_list::label): New function. (jit_block::label, jit_block::print): Implementation moved to cc file. * jit-ir.h (jit_block_list::label): New function delcaration. (jit_block::label, jit_block::print): Implementation moved to cc file. (jit_block::print): Make it clear when a block has not been labeled. * pt-jit.cc (jit_inter::inter, jit_infer::construct_ssa, jit_function_info::jit_function_info, jit_info::compile): Use jit_block_list::label.