fibmap: need linux/fs.h for FIBMAP

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/tools/fibmap.c b/tools/fibmap.c
index c672808..a6a112b 100644
--- a/tools/fibmap.c
+++ b/tools/fibmap.c
@@ -11,7 +11,7 @@
 #include <libgen.h>
 #include <linux/hdreg.h>
 #include <linux/types.h>
-// #include <linux/fs.h>
+#include <linux/fs.h>
 
 struct file_ext {
 	__u32 f_pos;