* adding currently failing test to arm regression
* updated CMakeLists to include building arm regression test
Merge commit '9e679e77538' into next
Fixed bug in Thumb2 pop caused by me incorrectly assuming that
ARM_SP == 13, ARM_LR == 14, and ARM_PC == 15, which is not the case

Changed from using symbols to just using the direct constants

Also added debugging facility for printing some of the VM's inner workings
for tracing purposes