PR symtab/14442:

	PR symtab/14442:
	* c-typeprint.c (cp_type_print_method_args): Handle 'restrict'.
	(c_type_print_modifier): Likewise.
	* dwarf2read.c (read_tag_restrict_type): New function.
	(read_type_die_1): Handle DW_TAG_restrict_type.
	* gdbtypes.c (make_restrict_type): New function.
	(recursive_dump_type): Handle TYPE_RESTRICT.
	* gdbtypes.h (enum type_flag_values): Renumber.
	(enum type_instance_flag_value): Add
	TYPE_INSTANCE_FLAG_RESTRICT.
	(TYPE_RESTRICT): New macro.
	(make_restrict_type): Declare.
gdb/testsuite
	* gdb.dwarf2/dw2-restrict.S: New file.
	* gdb.dwarf2/dw2-restrict.c: New file.
	* gdb.dwarf2/dw2-restrict.exp: New file.