Revert "binding.gyp.cmake: Fix npm builds by stopping dependency on json-c"
Revert "binding.gyp.cmake: Fix npm builds by stopping dependency on json-c"

This reverts commit 50213f97bc11b351ad28a01b010746c0436d66c3. This sets
JSONPLAT during compilation and doesn't disable it during cmake's configure
process which is done by jenkins. This means that mraa_init_platform_json never
gets define since it's under an #ifndef

jontrulson/mraa,stefan-andritoiu/mraa-gpio-chardev,sergev/mraa,whbruce/mraa,KurtE/mraa,malikabhi05/mraa,arfoll/mraa,stefan-andritoiu/mraa-gpio-chardev,arunlee77/mraa,stefan-andritoiu/mraa,stefan-andritoiu/mraa-gpio-chardev,yongli3/mraa,malikabhi05/mraa,sergev/mraa,Propanu/mraa,yongli3/mraa,spitfire88/mraa,sergev/mraa,intel-iot-devkit/mraa,spitfire88/mraa,arunlee77/mraa,spitfire88/mraa,intel-iot-devkit/mraa,w4ilun/mraa,sergev/mraa,KurtE/mraa,KurtE/mraa,petreeftime/mraa,g-vidal/mraa,w4ilun/mraa,Propanu/mraa,alext-mkrs/mraa,g-vidal/mraa,g-vidal/mraa,Hbrinj/mraa,alext-mkrs/mraa,whbruce/mraa,spitfire88/mraa,Jon-ICS/mraa,andreivasiliu2211/mraa,petreeftime/mraa,jontrulson/mraa,stefan-andritoiu/mraa,andreivasiliu2211/mraa,andreivasiliu2211/mraa,ncrastanaren/mraa,stefan-andritoiu/mraa,g-vidal/mraa,stefan-andritoiu/mraa-gpio-chardev,stefan-andritoiu/mraa,ProfFan/mraa,ncrastanaren/mraa,alext-mkrs/mraa,ncrastanaren/mraa,malikabhi05/mraa,petreeftime/mraa,whbruce/mraa,malikabhi05/mraa,ProfFan/mraa,arfoll/mraa,petreeftime/mraa,arunlee77/mraa,jontrulson/mraa,sergev/mraa,Propanu/mraa,arfoll/mraa,Hbrinj/mraa,Propanu/mraa,KurtE/mraa,w4ilun/mraa,yongli3/mraa,ProfFan/mraa,g-vidal/mraa,jontrulson/mraa,stefan-andritoiu/mraa,Hbrinj/mraa,andreivasiliu2211/mraa,malikabhi05/mraa,ProfFan/mraa,alext-mkrs/mraa,yongli3/mraa,intel-iot-devkit/mraa,ncrastanaren/mraa,alext-mkrs/mraa,ncrastanaren/mraa,Jon-ICS/mraa,jontrulson/mraa,stefan-andritoiu/mraa-gpio-chardev,Hbrinj/mraa,arfoll/mraa,Jon-ICS/mraa,Propanu/mraa,intel-iot-devkit/mraa,yongli3/mraa,whbruce/mraa,intel-iot-devkit/mraa,w4ilun/mraa,arunlee77/mraa,arfoll/mraa,KurtE/mraa