Add CFI annotation.

	* sysdeps/unix/sysv/linux/hppa/clone.S (__clone): Add .cfi annotation.
	* sysdeps/unix/sysv/linux/hppa/getcontext.S (__getcontext): Likewise.
	* sysdeps/unix/sysv/linux/hppa/pt-vfork.S (__vfork): Likewise.
	* sysdeps/unix/sysv/linux/hppa/setcontext.S (__setcontext): Likewise.