Fix makefiles -- the auto-addition of -D switches to each LUFA compile time option was faulty, due to GNUMake becomming confused by the spaces in the USE_STATIC_OPTIONS lines. Make user add in the switches explicitly instead.

Demos/Host/makefile

@@ -14,5 +14,5 @@
 # code.
 
 %:
-	make -C ClassDriver/ $@
+#	make -C ClassDriver/ $@        <TODO: Re-enable after Host class drivers complete>
 	make -C LowLevel/ $@