Update CORE build module to print out additional help information.

LUFA/Build/lufa.core.in

@@ -60,6 +60,11 @@ help:
 	@echo " module as a required parameter before including the build module  "
 	@echo " in your project makefile. Parameters marked as optional will      "
 	@echo " assume a default value in the module if not user-assigned.        "
+	@echo "                                                                   "
+	@echo " By default the target output shows both a friendly summary, as    "
+	@echo " well as the actual invoked command. To suppress the output of the "
+	@echo " invoked commands and show only the friendly command output, run   "
+	@echo " make with the \"-s\" switch added before the target(s).           "		
 	@echo "==================================================================="
 	@echo "  Currently used modules in this application:                      "
 	@echo "                                                                   "