ofono: replace version 1.7 with git repo

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
ofono: fix 'O_CLOEXEC' undeclared issue

plugins/gobi.c: In function 'gobi_enable':
plugins/gobi.c:316:42: error: 'O_CLOEXEC' undeclared (first use in this function)
plugins/gobi.c:316:42: note: each undeclared identifier is reported only once for each function it appears in

Signed-off-by: Fudong Bai <fudongbai@gmail.com>