Make the "on change" checkbox for memchecks work.

But, for now, only on sw and similar instructions, the rest don't work
yet and just always break.
Update the debugger on a break instruction.

Before it would still show "Stop" even though it was paused.
Merge branch 'debugger2' of https://github.com/unknownbrackets/ppsspp into unknownbrackets-debugger2

Conflicts:
	Core/Debugger/Breakpoints.cpp