Minor tweak to the BuildTest master makefile for better console output.

BuildTests/makefile

@@ -12,8 +12,12 @@
 
 all:
 %:
+	@echo Executing \"make $@\" on all LUFA build tests.
+	@echo
 	$(MAKE) -C BoardDriverTest $@
 	$(MAKE) -C BootloaderTest $@
 	$(MAKE) -C ModuleTest $@
 	$(MAKE) -C SingleUSBModeTest $@
 	$(MAKE) -C StaticAnalysisTest $@
+	@echo
+	@echo LUFA build test \"make $@\" operation complete.
\ No newline at end of file