arm64 kprobes/systemtap support progress

[William Cohen]

After making some additional fixes in the arm64 kprobes support for simulating instructions that are not single stepped the systemtap testsuite made a complete run without crashing the arm64 system.

		=== systemtap Summary ===

# of expected passes		2736
# of unexpected failures	689
# of unexpected successes	1
# of expected failures		312
# of unknown successes		2
# of known failures		59
# of untested testcases		408
# of unsupported tests		17

The test results have been uploaded to:

web.elastic.org/~dejazilla/viewsummary.php?summary=%3D%27%3C5464A1C7.7090000%40redhat.com%3E%27

I have not had a chance to review the test results yet.  I am sure there is room for improvement in them.  There are some syscall tests that need to be updated for the syscalls that the arm64 used and some of the tests fail because currently there is no uprobes support.

-Will