fixed opencv_modules directives for < 3.2.0
fixed opencv_modules directives for < 3.2.0

justadudewhohacks/opencv4nodejs,justadudewhohacks/opencv4nodejs,justadudewhohacks/opencv4nodejs,justadudewhohacks/opencv4nodejs,justadudewhohacks/opencv4nodejs,justadudewhohacks/opencv4nodejs