examples: Added isrExit() call to gpio-tool.js for ISR shutdown testing
examples: Added isrExit() call to gpio-tool.js for ISR shutdown testing

Signed-off-by: Henry Bruce <57ea958cad66de244404958c9a01f7a4ad51b29e@intel.com>
Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>

jontrulson/mraa,alext-mkrs/mraa,ProfFan/mraa,arfoll/mraa,stefan-andritoiu/mraa,sergev/mraa,ProfFan/mraa,jontrulson/mraa,ncrastanaren/mraa,intel-iot-devkit/mraa,whbruce/mraa,ncrastanaren/mraa,g-vidal/mraa,arunlee77/mraa,intel-iot-devkit/mraa,jontrulson/mraa,Pillar1989/mraa,arfoll/mraa,stefan-andritoiu/mraa,stefan-andritoiu/mraa-gpio-chardev,intel-iot-devkit/mraa,w4ilun/mraa,Propanu/mraa,malikabhi05/mraa,intel-iot-devkit/mraa,petreeftime/mraa,malikabhi05/mraa,jontrulson/mraa,arfoll/mraa,spitfire88/mraa,yongli3/mraa,Hbrinj/mraa,Propanu/mraa,stefan-andritoiu/mraa-gpio-chardev,g-vidal/mraa,Propanu/mraa,stefan-andritoiu/mraa,intel-iot-devkit/mraa,alext-mkrs/mraa,petreeftime/mraa,Propanu/mraa,stefan-andritoiu/mraa-gpio-chardev,spitfire88/mraa,Jon-ICS/mraa,malikabhi05/mraa,Jon-ICS/mraa,Hbrinj/mraa,w4ilun/mraa,whbruce/mraa,KurtE/mraa,g-vidal/mraa,KurtE/mraa,stefan-andritoiu/mraa,stefan-andritoiu/mraa-gpio-chardev,alext-mkrs/mraa,spitfire88/mraa,malikabhi05/mraa,arfoll/mraa,andreivasiliu2211/mraa,arunlee77/mraa,arunlee77/mraa,yongli3/mraa,Pillar1989/mraa,Propanu/mraa,yongli3/mraa,Hbrinj/mraa,alext-mkrs/mraa,w4ilun/mraa,malikabhi05/mraa,Jon-ICS/mraa,yongli3/mraa,petreeftime/mraa,sergev/mraa,sergev/mraa,andreivasiliu2211/mraa,sergev/mraa,spitfire88/mraa,petreeftime/mraa,KurtE/mraa,g-vidal/mraa,andreivasiliu2211/mraa,ProfFan/mraa,andreivasiliu2211/mraa,whbruce/mraa,stefan-andritoiu/mraa-gpio-chardev,g-vidal/mraa,whbruce/mraa,w4ilun/mraa,KurtE/mraa,ncrastanaren/mraa,yongli3/mraa,Hbrinj/mraa,arfoll/mraa,ncrastanaren/mraa,KurtE/mraa,alext-mkrs/mraa,ncrastanaren/mraa,Pillar1989/mraa,stefan-andritoiu/mraa,ProfFan/mraa,jontrulson/mraa,arunlee77/mraa,sergev/mraa