added some ocemu-related debug modules

modules/debug/ocemu-display.lua

@@ -0,0 +1,7 @@
+s("ocemu display server",function()
+ while true do
+  if ev[1] == "display" then
+   component.invoke(component.list("ocemu")(),"log",ev[2] or "")
+  end
+ end
+end)

modules/debug/ocemu-heartbeat.lua

@@ -0,0 +1,9 @@
+_G.DEBUG=true
+s("heartbeat",function()
+ while true do
+  if _G.DEBUG then
+   component.invoke(component.list("ocemu")(),"log","heartbeat:"..tostring(computer.uptime()))
+  end
+  C.yield()
+ end
+end)