o add gnususb as reference bootloader

o refactor boot loader  cpde
o

tools/gnusb/bootloader/software/Makefile

@@ -0,0 +1,33 @@
+# Inspired by the PowerSwitch makefile ba Christian Starkjohann, 2005 by OBJECTIVE DEVELOPMENT Software GmbH
+
+# Use the following 3 lines on Unix (uncomment the framework on Mac OS X):
+USBFLAGS = `libusb-config --cflags`
+USBLIBS = `libusb-config --libs` #-framework CoreFoundation
+EXE_SUFFIX =
+
+# Use the following 3 lines on Windows and comment out the 3 above. You may
+# have to change the include paths to where you installed libusb-win32
+#USBFLAGS = -I/usr/local/include
+#USBLIBS = -L/usr/local/lib -lusb
+#EXE_SUFFIX = .exe
+
+CC		= gcc
+CFLAGS	= $(USBFLAGS) -O -Wall
+LIBS	= $(USBLIBS)
+
+PROGRAM = snesram_bootuploader$(EXE_SUFFIX)
+
+
+all: $(PROGRAM)
+
+.c.o:
+	$(CC) $(CFLAGS) -c $<
+
+$(PROGRAM): snesram_bootuploader.o
+	$(CC) -o $(PROGRAM) snesram_bootuploader.o $(LIBS)
+
+strip: $(PROGRAM)
+	strip $(PROGRAM)
+
+clean:
+	rm -f *.o $(PROGRAM)