*printf-{posix,gnu}: Tweak module descriptions. * modules/c-snzprintf-gnu (Description): Say "POSIX compatible", not "POSIX compliant", since these modules don't implement the %n directive by default any more. * modules/c-vaszprintf-gnu (Description): Likewise. * modules/c-vsnzprintf-gnu (Description): Likewise. * modules/obstack-printf-posix (Description): Likewise. * modules/obstack-zprintf-gnu (Description): Likewise. * modules/obstack-zprintf-posix (Description): Likewise. * modules/snzprintf-gnu (Description): Likewise. * modules/snzprintf-posix (Description): Likewise. * modules/szprintf-gnu (Description): Likewise. * modules/szprintf-posix (Description): Likewise. * modules/vaszprintf-gnu (Description): Likewise. * modules/vaszprintf-posix (Description): Likewise. * modules/vsnzprintf-gnu (Description): Likewise. * modules/vsnzprintf-posix (Description): Likewise. * modules/vszprintf-gnu (Description): Likewise. * modules/vszprintf-posix (Description): Likewise.