ubifs: Correct dereferencing of files-after-symlinks

Files in directories which are symlinked to were not dereferenced
correctly in last commit. E.g., with a symlink

   /boot/lnk -> /boot/real_dir

loading

   /boot/lnk/uImage

will fail. This patch fixes that by simply seeing to it that the target
base directory has a slash after it.
Signed-off-by: NSimon Kagstrom <simon.kagstrom@netinsight.net>
Signed-off-by: NStefan Roese <sr@denx.de>

fs/ubifs/ubifs.c

@@ -439,7 +439,7 @@ static unsigned long ubifs_findfile(struct super_block *sb, char *filename)
 				continue;
 			}
 			/* Relative to cur dir */
-			sprintf(buf, "%s%s",
+			sprintf(buf, "%s/%s",
 					link_name, next == NULL ? "" : next);
 			memcpy(symlinkpath, buf, sizeof(buf));
 			next = name = symlinkpath;