* sysdeps/unix/sysv/linux/hppa/clone.S: Accept extra arguments
required for NPTL.
* sysdeps/unix/sysv/linux/hppa/sysdep.c: Use var args for 6 arg
syscall.
* sysdeps/unix/sysv/linux/hppa/sysdep.h: Move DOARGS and UNDOARGS
into PSEUDO_*'s.
(ENTRY_LEAF): Define.
(PSEUDO_NOERRNO, PSEUDO_ERRVAL): Use ENTRY_LEAF.
(DO_CALL): Create frame.