README.md: Add install instructions for openSUSE
README.md: Add install instructions for openSUSE

Signed-off-by: Cédric Bosdonnat <5de0be53dc3aabb89d8379dd21cea40e0795c9b1@suse.com>
Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>

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