binutils* rclex.c: Add OWNERDRAW keyword. * rcparse.y: Add OWNERDRAW token. (menuitem_flag) Add BITMAP and OWNERDRAW entries. * resrc.c (write_rc_menuitems): Add support for OWNERDRAW and BITMAP flags. * windres.c (extended_menuitems): Likewise. * testsuite/binutils-all/windres/menuitem_flags.rc: New test.