fs: Fix missing 'bit' in comment

The missing word may make it hard for other developers to
understand it.
Signed-off-by: Chucheng Luo <luochucheng@vivo.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

fs/vboxsf/dir.c

@@ -134,7 +134,7 @@ static bool vboxsf_dir_emit(struct file *dir, struct dir_context *ctx)
 		d_type = vboxsf_get_d_type(info->info.attr.mode);
 
 		/*
-		 * On 32 bit systems pos is 64 signed, while ino is 32 bit
+		 * On 32-bit systems pos is 64-bit signed, while ino is 32-bit
 		 * unsigned so fake_ino may overflow, check for this.
 		 */
 		if ((ino_t)(ctx->pos + 1) != (u64)(ctx->pos + 1)) {