New syntax for mt print symbols,msymbols,psymbols.

New syntax for mt print symbols,msymbols,psymbols.

gdb/ChangeLog:

	* NEWS: Document new syntax for "mt print symbols", "mt print psymbols"
	and "mt print msymbols" commands.
	* psymtab.c (DEV_TTY): Delete.
	(dump_psymtab_addrmap): Don't dump if psymtabs_addrmap is NULL.
	(maintenance_print_psymbols): Rewrite for new syntax:
	mt print psymbols [-objfile objfile] [-pc address] [outfile]
	mt print psymbols [-objfile objfile] [-source source] [outfile]
	(_initialize_psymtab): Update help text.
	* symmisc.c (maintenance_print_symbols): Rewrite for new syntax:
	mt print symbols [-pc address] [outfile]
	mt print symbols [-objfile objfile] [-source source] [outfile]
	(maintenance_print_msymbols): Rewrite for new syntax:
	mt print msymbols [-objfile objfile] [outfile]
	Only print symbols for the current progspace.
	(_initialize_symmisc): Update help text.

gdb/doc/ChangeLog:

	* gdb.texinfo (Symbols): Update docs for symbol printing maintenance
	commands.

gdb/testsuite/ChangeLog:

	* gdb.base/maint.exp: Update tests for maint print symbols, psymbols
	and msymbols.