f2fs_io: add include dir

Bug: 174916021
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Change-Id: I8fb3557f557f23cd6d1514b4911bb1ac01b00a16
diff --git a/tools/f2fs_io/Android.bp b/tools/f2fs_io/Android.bp
index 2cc81eb..7607d5a 100644
--- a/tools/f2fs_io/Android.bp
+++ b/tools/f2fs_io/Android.bp
@@ -3,6 +3,9 @@
     cflags: [
         "-Wno-unused-function"
     ],
+    include_dirs: [
+       "external/f2fs-tools/include/",
+    ],
 }
 
 cc_binary {