delay accounting: maintainer update

Update the delay accounting and taskstats maintainer to Balbir Singh.
I spoke to Shailabh and he is now busy with other things.

Cc: Shailabh Nagar <nagar1234@in.ibm.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index ba7ac13..64197ef 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3183,8 +3183,8 @@
 S:	Maintained
 
 PER-TASK DELAY ACCOUNTING
-P:	Shailabh Nagar
-M:	nagar@watson.ibm.com
+P:	Balbir Singh
+M:	balbir@linux.vnet.ibm.com
 L:	linux-kernel@vger.kernel.org
 S:	Maintained
 
@@ -3886,8 +3886,8 @@
 S:	Maintained
 
 TASKSTATS STATISTICS INTERFACE
-P:	Shailabh Nagar
-M:	nagar@watson.ibm.com
+P:	Balbir Singh
+M:	balbir@linux.vnet.ibm.com
 L:	linux-kernel@vger.kernel.org
 S:	Maintained