dbg: prefix log with datetime

frontend/dbg.lua

@@ -20,7 +20,7 @@ local function LvDEBUG(lv, ...)
     if isAndroid then
         android.LOGI("#"..line)
     else
-        print("#"..line)
+        print(string.format("# %s %s", os.date("%x-%X"), line))
         io.stdout:flush()
     end
 end

kodev

@@ -109,7 +109,7 @@ ${SUPPORTED_TARGETS}"
         *)
             check_submodules
             make
-            assert_ret_zero $? "Failed to build emulator!"
+            assert_ret_zero $? "Failed to build emulator! Try run with -v for more information."
             setup_env
             ;;
     esac