aarch64: Add setjmp and longjmp SystemTap probes

Add setjmp, longjmp and longjmp_target SystemTap probes.

ChangeLog:

2014-04-22  Will Newton  <will.newton@linaro.org>
	    Venkataramanan Kumar  <venkataramanan.kumar@linaro.org>

	* sysdeps/aarch64/__longjmp.S: Include stap-probe.h.
	(__longjmp): Add longjmp and longjmp_target SystemTap
	probes.
	* sysdeps/aarch64/setjmp.S: Include stap-probe.h.
	(__sigsetjmp): Add setjmp SystemTap probe.