f2fs: fix build error on android tracepoints

Fixes: 5e2c340821b1 ("ANDROID: f2fs: add android fsync tracepoint")
Change-Id: Idbf409f931e6826cc71d32ff0042d64ea68502aa
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
diff --git a/fs/mpage.c b/fs/mpage.c
index d4e17c8..601c261 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -38,6 +38,8 @@
 EXPORT_TRACEPOINT_SYMBOL(android_fs_datawrite_end);
 EXPORT_TRACEPOINT_SYMBOL(android_fs_dataread_start);
 EXPORT_TRACEPOINT_SYMBOL(android_fs_dataread_end);
+EXPORT_TRACEPOINT_SYMBOL(android_fs_fsync_start);
+EXPORT_TRACEPOINT_SYMBOL(android_fs_fsync_end);
 
 /*
  * I/O completion handler for multipage BIOs.