MAINTAINERS: Update eCryptfs maintainer address

Update my email address in MAINTAINERS.
Signed-off-by: NTyler Hicks <tyhicks@canonical.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -2387,7 +2387,7 @@ F:	include/linux/netfilter_bridge/ebt_*.h
 F:	net/bridge/netfilter/ebt*.c
 
 ECRYPT FILE SYSTEM
-M:	Tyler Hicks <tyhicks@linux.vnet.ibm.com>
+M:	Tyler Hicks <tyhicks@canonical.com>
 M:	Dustin Kirkland <kirkland@canonical.com>
 L:	ecryptfs@vger.kernel.org
 W:	https://launchpad.net/ecryptfs