Bootloader make issue (#2975)

* Added Modular keyboards L,R and NUM

Created code modules for the 3 modules of the modular keyboard.
Original idea by MechboardsUK. Uses i2c implementation similar to lets
split

* Remove modular from master

This is to fix incorrect branching

* fixed bootloader makefile

- Echo -e does not behave coorectly on mac
- Replaced with equivilant printf statements

* quick typo fix

tmk_core/avr.mk

@@ -252,16 +252,16 @@ extcoff: $(BUILD_DIR)/$(TARGET).elf
 
 bootloader:
 	make -C lib/lufa/Bootloaders/DFU/ clean
-	echo -e "#ifndef QMK_KEYBOARD\n#define QMK_KEYBOARD\n" > lib/lufa/Bootloaders/DFU/Keyboard.h
-	echo -e `$(GREP) "MANUFACTURER" $(ALL_CONFIGS) -h | tail -1` >> lib/lufa/Bootloaders/DFU/Keyboard.h
-	echo -e `$(GREP) "PRODUCT" $(ALL_CONFIGS) -h | tail -1` Bootloader >> lib/lufa/Bootloaders/DFU/Keyboard.h
-	echo -e `$(GREP) "QMK_ESC_OUTPUT" $(ALL_CONFIGS) -h | tail -1` >> lib/lufa/Bootloaders/DFU/Keyboard.h
-	echo -e `$(GREP) "QMK_ESC_INPUT" $(ALL_CONFIGS) -h | tail -1` >> lib/lufa/Bootloaders/DFU/Keyboard.h
-	echo -e `$(GREP) "QMK_LED" $(ALL_CONFIGS) -h | tail -1` >> lib/lufa/Bootloaders/DFU/Keyboard.h
-	echo -e `$(GREP) "QMK_SPEAKER" $(ALL_CONFIGS) -h | tail -1` >> lib/lufa/Bootloaders/DFU/Keyboard.h
-	echo -e "\n#endif" >> lib/lufa/Bootloaders/DFU/Keyboard.h
+	printf "#ifndef QMK_KEYBOARD\n#define QMK_KEYBOARD\n\n" > lib/lufa/Bootloaders/DFU/Keyboard.h
+	printf "%s\n" "`$(GREP) "MANUFACTURER" $(ALL_CONFIGS) -h | tail -1`" >> lib/lufa/Bootloaders/DFU/Keyboard.h
+	printf "%s Bootloader\n" "`$(GREP) "PRODUCT" $(ALL_CONFIGS) -h | tail -1`" >> lib/lufa/Bootloaders/DFU/Keyboard.h
+	printf "%s\n" "`$(GREP) "QMK_ESC_OUTPUT" $(ALL_CONFIGS) -h | tail -1`" >> lib/lufa/Bootloaders/DFU/Keyboard.h
+	printf "%s\n" "`$(GREP) "QMK_ESC_INPUT" $(ALL_CONFIGS) -h | tail -1`" >> lib/lufa/Bootloaders/DFU/Keyboard.h
+	printf "%s\n" "`$(GREP) "QMK_LED" $(ALL_CONFIGS) -h | tail -1`" >> lib/lufa/Bootloaders/DFU/Keyboard.h
+	printf "%s\n" "`$(GREP) "QMK_SPEAKER" $(ALL_CONFIGS) -h | tail -1`" >> lib/lufa/Bootloaders/DFU/Keyboard.h
+	printf "\n#endif" >> lib/lufa/Bootloaders/DFU/Keyboard.h
 	make -C lib/lufa/Bootloaders/DFU/
-	echo -e "BootloaderDFU.hex copied to $(TARGET)_bootloader.hex"
+	printf "BootloaderDFU.hex copied to $(TARGET)_bootloader.hex\n"
 	cp lib/lufa/Bootloaders/DFU/BootloaderDFU.hex $(TARGET)_bootloader.hex
 
 production: $(BUILD_DIR)/$(TARGET).hex bootloader cpfirmware