PR debug/4252
	* c-opts.c (c_common_handle_option): Pass -fdump argument suffix
	to dump_switch_p().
	* tree-dump.c (dump_switch_p): Remove redundant 'dump-' prefix
	from static strings in dump_files.
cp:
	* optimize.c (dump_function): Form complete flag name by
	prefixing 'fdump-' to string returned by dump_flag_name().
java:
	* lang.c (java_handle_option): Likewise.

From-SVN: r68137