DebugInterface: Watches methods added

Move Watches to Common

Source/Core/Core/PowerPC/PowerPC.cpp

@@ -34,7 +34,6 @@ static bool s_cpu_core_base_is_injected = false;
 Interpreter* const s_interpreter = Interpreter::getInstance();
 static CoreMode s_mode = CoreMode::Interpreter;
 
-Watches watches;
 BreakPoints breakpoints;
 MemChecks memchecks;
 PPCDebugInterface debug_interface;