Use bool in require_partial_symbols

Use bool in require_partial_symbols

This changes require_partial_symbols to use bool as its parameter
type.

gdb/ChangeLog
2019-11-24  Tom Tromey  <tom@tromey.com>

	* symfile.c (read_symbols): Update.
	* psymtab.c (require_partial_symbols): Change type of "verbose" to
	bool.
	(psym_map_symtabs_matching_filename, find_pc_sect_psymtab)
	(psym_lookup_symbol, psym_find_last_source_symtab)
	(psym_forget_cached_source_info, psym_print_stats)
	(psym_expand_symtabs_for_function, psym_expand_all_symtabs)
	(psym_expand_symtabs_with_fullname, psym_map_symbol_filenames)
	(psym_map_matching_symbols, psym_expand_symtabs_matching)
	(psym_find_compunit_symtab_by_address)
	(maintenance_print_psymbols, maintenance_info_psymtabs)
	(maintenance_check_psymtabs): Update.
	* psymtab.h (require_partial_symbols): Change type of "verbose" to
	bool.

Change-Id: Iae87aa5e4590706bb9e90a33adb86f1fe0fbf3c7