Merge pull request #779 from MissionSt/makefile-fix-abl

Makefile fixes

Marlin/Makefile

 VPATH += $(HARDWARE_DIR)/libraries/Wire/utility
 VPATH += $(HARDWARE_DIR)/libraries/LiquidTWI2
 endif
-ifeq ($(WIRE, 1)
+ifeq ($(WIRE), 1)
 VPATH += $(HARDWARE_DIR)/libraries/Wire
 VPATH += $(HARDWARE_DIR)/libraries/Wire/utility
 endif
 	MarlinSerial.cpp Sd2Card.cpp SdBaseFile.cpp SdFatUtil.cpp	\
 	SdFile.cpp SdVolume.cpp motion_control.cpp planner.cpp		\
 	stepper.cpp temperature.cpp cardreader.cpp ConfigurationStore.cpp \
-	watchdog.cpp SPI.cpp Servo.cpp Tone.cpp ultralcd.cpp digipot_mcp4451.cpp
+	watchdog.cpp SPI.cpp Servo.cpp Tone.cpp ultralcd.cpp digipot_mcp4451.cpp \
+	vector_3.cpp qr_solve.cpp
 ifeq ($(LIQUID_TWI2), 0)
 CXXSRC += LiquidCrystal.cpp
 else