Add operators / and * for profile_{count,probability}.

gcc/ChangeLog:

	* bb-reorder.cc (find_traces_1_round): Add operators / and * and
	use them.
	(better_edge_p): Likewise.
	* cfgloop.cc (find_subloop_latch_edge_by_profile): Likewise.
	* cfgloopmanip.cc (scale_loop_profile): Likewise.
	* cfgrtl.cc (force_nonfallthru_and_redirect): Likewise.
	* cgraph.cc (cgraph_edge::maybe_hot_p): Likewise.
	* config/sh/sh.cc (expand_cbranchdi4): Likewise.
	* dojump.cc (do_compare_rtx_and_jump): Likewise.
	* final.cc (compute_alignments): Likewise.
	* ipa-cp.cc (update_counts_for_self_gen_clones): Likewise.
	(decide_about_value): Likewise.
	* ipa-inline-analysis.cc (do_estimate_edge_time): Likewise.
	* loop-unroll.cc (unroll_loop_runtime_iterations): Likewise.
	* modulo-sched.cc (sms_schedule): Likewise.
	* omp-expand.cc (extract_omp_for_update_vars): Likewise.
	(expand_omp_ordered_sink): Likewise.
	(expand_omp_for_ordered_loops): Likewise.
	(expand_omp_for_static_nochunk): Likewise.
	* predict.cc (maybe_hot_count_p): Likewise.
	(probably_never_executed): Likewise.
	(set_even_probabilities): Likewise.
	(handle_missing_profiles): Likewise.
	(expensive_function_p): Likewise.
	* profile-count.h: Likewise.
	* profile.cc (compute_branch_probabilities): Likewise.
	* stmt.cc (emit_case_dispatch_table): Likewise.
	* symtab-thunks.cc (expand_thunk): Likewise.
	* tree-ssa-loop-manip.cc (tree_transform_and_unroll_loop): Likewise.
	* tree-ssa-sink.cc (select_best_block): Likewise.
	* tree-switch-conversion.cc (switch_decision_tree::analyze_switch_statement): Likewise.
	(switch_decision_tree::balance_case_nodes): Likewise.
	(switch_decision_tree::emit_case_nodes): Likewise.
	* tree-vect-loop.cc (scale_profile_for_vect_loop): Likewise.