Lower a LOG(WARNING) to VLOG(deopt) in instrumentation

During late-attach of a debugger it is fairly common for there to be
non-debuggable frames present. Change the instrumentation code to not
print a warning for all of them unless we have -verbose:deopt.

Test: None
Change-Id: I6f995f4d0eb5164e205a0eac209b4ff1e073d017