support mounting f2fs in recovery mode

Change-Id: Ic03b3e95c4b5cd49b92cb3ec697e327a59421549
Signed-off-by: Lianjun Huang <huanglianjun@vivo.com>
diff --git a/roots.cpp b/roots.cpp
index 06a77c1..c29771a 100644
--- a/roots.cpp
+++ b/roots.cpp
@@ -126,7 +126,7 @@
   mkdir(mount_point, 0755);  // in case it doesn't already exist
 
   if (strcmp(v->fs_type, "ext4") == 0 || strcmp(v->fs_type, "squashfs") == 0 ||
-      strcmp(v->fs_type, "vfat") == 0) {
+      strcmp(v->fs_type, "vfat") == 0 || strcmp(v->fs_type, "f2fs") == 0) {
     int result = mount(v->blk_device, mount_point, v->fs_type, v->flags, v->fs_options);
     if (result == -1 && fs_mgr_is_formattable(v)) {
       PLOG(ERROR) << "Failed to mount " << mount_point << "; formatting";