ART Runtime: Add movb $xx,yy fault handling

Handle a movb $xx,yy instruction in the segmentation violation fault
handler.  This is a simple addition to the '1 byte immediate' opcodes.

This test case shows up in 122-npe using my private backend changes.

Change-Id: I92d816bbf5912135b931f4a76e6c72c0d75eff3b
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>