I2c-compass.cpp: fix example to use HMC5883L_CONT_MODE
I2c-compass.cpp: fix example to use HMC5883L_CONT_MODE

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

Kiritoalex/mraa,sergev/mraa,anonymouse64/mraa,sundw2014/mraa,SyrianSpock/mraa,intel-iot-devkit/mraa,smileboywtu/mraa,yongli3/mraa,whbruce/mraa,seem-sky/mraa,Hbrinj/mraa,Propanu/mraa,stefan-andritoiu/mraa-gpio-chardev,jontrulson/mraa,alexandru-elisei/mraa,alex1818/mraa,alext-mkrs/mraa,STANAPO/mraa,nioinnovation/mraa,mircea/mraa,arfoll/mraa,ProfFan/mraa,sergev/mraa,Jon-ICS/mraa,arunlee77/mraa,neuberfran/mraa,intel-iot-devkit/mraa,alex1818/mraa,pctj101/mraa,sundw2014/mraa,nioinnovation/mraa,yongli3/mraa,stefan-andritoiu/mraa-gpio-chardev,Propanu/mraa,neuberfran/mraa,petreeftime/mraa,mircea/mraa,jontrulson/mraa,stefan-andritoiu/mraa-gpio-chardev,ncrastanaren/mraa,ncrastanaren/mraa,anonymouse64/mraa,allela-roy/mraa,intel-iot-devkit/mraa,Jon-ICS/mraa,alexandru-elisei/mraa,Jon-ICS/mraa,spitfire88/mraa,tripzero/mraa,arfoll/mraa,stefan-andritoiu/mraa,g-vidal/mraa,stefan-andritoiu/mraa,whbruce/mraa,alext-mkrs/mraa,yoyojacky/mraa,yoyojacky/mraa,yongli3/mraa,timrtoo/Intel,stefan-andritoiu/mraa,arfoll/mraa,SyrianSpock/mraa,tripzero/mraa,w4ilun/mraa,alex1818/mraa,ProfFan/mraa,andreivasiliu2211/mraa,Pillar1989/mraa,pctj101/mraa,damcclos/mraa,Meirtz/mraa,noahchense/mraa,yangjae/mraa,alexandru-elisei/mraa,KurtE/mraa,nioinnovation/mraa,seem-sky/mraa,smileboywtu/mraa,ncrastanaren/mraa,Meirtz/mraa,timrtoo/Intel,yongli3/mraa,KurtE/mraa,noahchense/mraa,arfoll/mraa,ncrastanaren/mraa,arunlee77/mraa,allela-roy/mraa,timrtoo/Intel,w4ilun/mraa,jontrulson/mraa,matt-auld/mraa,alext-mkrs/mraa,stefan-andritoiu/mraa,sundw2014/mraa,malikabhi05/mraa,ncrastanaren/mraa,neuroidss/mraa,andreivasiliu2211/mraa,sergev/mraa,whbruce/mraa,neuberfran/mraa,ProfFan/mraa,petreeftime/mraa,tripzero/mraa,whbruce/mraa,malikabhi05/mraa,stefan-andritoiu/mraa-gpio-chardev,SyrianSpock/mraa,noahchense/mraa,andreivasiliu2211/mraa,stefan-andritoiu/mraa-gpio-chardev,intel-iot-devkit/mraa,Kiritoalex/mraa,neuroidss/mraa,Hbrinj/mraa,STANAPO/mraa,andreivasiliu2211/mraa,neuberfran/mraa,alexandru-elisei/mraa,neuroidss/mraa,w4ilun/mraa,alext-mkrs/mraa,timrtoo/Intel,sundw2014/mraa,pctj101/mraa,malikabhi05/mraa,Pillar1989/mraa,ProfFan/mraa,arunlee77/mraa,g-vidal/mraa,malikabhi05/mraa,spitfire88/mraa,yoyojacky/mraa,w4ilun/mraa,yongli3/mraa,sergev/mraa,sergev/mraa,pctj101/mraa,seem-sky/mraa,intel-iot-devkit/mraa,arfoll/mraa,spitfire88/mraa,seem-sky/mraa,Propanu/mraa,Hbrinj/mraa,damcclos/mraa,KurtE/mraa,noahchense/mraa,Hbrinj/mraa,zBMNForks/mraa,mircea/mraa,yangjae/mraa,malikabhi05/mraa,KurtE/mraa,g-vidal/mraa,pctj101/mraa,seem-sky/mraa,jontrulson/mraa,noahchense/mraa,Pillar1989/mraa,sundw2014/mraa,yangjae/mraa,spitfire88/mraa,Propanu/mraa,stefan-andritoiu/mraa,g-vidal/mraa,petreeftime/mraa,STANAPO/mraa,allela-roy/mraa,jontrulson/mraa,petreeftime/mraa,arunlee77/mraa,anonymouse64/mraa,damcclos/mraa,yangjae/mraa,matt-auld/mraa,zBMNForks/mraa,Propanu/mraa,zBMNForks/mraa,KurtE/mraa,alext-mkrs/mraa,Meirtz/mraa,neuberfran/mraa,timrtoo/Intel,smileboywtu/mraa,alexandru-elisei/mraa,Kiritoalex/mraa,g-vidal/mraa,matt-auld/mraa