gdb

	PR breakpoints/8357:
	* symtab.h (domain_enum_tag) <LABEL_DOMAIN>: Update comment.
	* linespec.c (decode_line_1): Update comment.  Call decode_label.
	(decode_label): New function.
	(symbol_found): Handle LOC_LABEL.
	* dwarf2read.c (new_symbol) <DW_TAG_label>: Set symbol's type and
	domain.  Call add_symbol_to_list.
gdb/doc
	* gdb.texinfo (Specify Location): Document labels.
gdb/testsuite
	* gdb.base/label.exp: New file.
	* gdb.base/label.c: New file.