more fixes for sammy

Change-Id: Ie11c673a204a328a82f767a2610c5f1d9a51233c

extendedcommands.c

@@ -977,7 +977,8 @@ void write_fstab_root(char *path, FILE *file)
 
     fprintf(file, "%s ", device);
     fprintf(file, "%s ", path);
-    fprintf(file, "%s rw\n", vol->fs_type2 != NULL ? "auto" : vol->fs_type);
+    // special case rfs cause auto will mount it as vfat on samsung.
+    fprintf(file, "%s rw\n", vol->fs_type2 != NULL && strcmp(vol->fs_type, "rfs") != 0 ? "auto" : vol->fs_type);
 }
 
 void create_fstab()

roots.c

@@ -175,6 +175,7 @@ int ensure_path_mounted(const char* path) {
         return mtd_mount_partition(partition, v->mount_point, v->fs_type, 0);
     } else if (strcmp(v->fs_type, "ext4") == 0 ||
                strcmp(v->fs_type, "ext3") == 0 ||
+               strcmp(v->fs_type, "rfs") == 0 ||
                strcmp(v->fs_type, "vfat") == 0) {
         // try fs type 2 first
         if ((result = try_mount(v->device, v->mount_point, v->fs_type, v->fs_options)) == 0)