MAINTAINERS: nilfs2: add header file for tracing

This adds header file "include/trace/events/nilfs2.h" to maintainer-ship
of nilfs2 so that updates to the nilfs2 header file go to the mailing list
of nilfs2.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -7491,6 +7491,7 @@ S:	Supported
 F:	Documentation/filesystems/nilfs2.txt
 F:	fs/nilfs2/
 F:	include/linux/nilfs2_fs.h
+F:	include/trace/events/nilfs2.h
 
 NINJA SCSI-3 / NINJA SCSI-32Bi (16bit/CardBus) PCMCIA SCSI HOST ADAPTER DRIVER
 M:	YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>