Profiler: Migrate global g_ProfileBlocks boolean to JitOptions

This global belongs in the JitOptions structure, as it's a conditional
setting (A.K.A. option) that changes the behavior of what the JIT does.

Plus it keeps the scope of the variable constrained to the general area
it's intended to be used and nothing further.

Source/Core/Core/PowerPC/JitInterface.cpp

@@ -79,6 +79,14 @@ CPUCoreBase* GetCore()
   return g_jit;
 }
 
+void SetProfilingState(ProfilingState state)
+{
+  if (!g_jit)
+    return;
+
+  g_jit->jo.profile_blocks = state == ProfilingState::Enabled;
+}
+
 void WriteProfileResults(const std::string& filename)
 {
   Profiler::ProfileStats prof_stats;