update Brian's email address

git-svn-id: http://root.cern.ch/svn/root/trunk@43994 27541ba8-7e3a-0410-8455-c3a389f83636

README/CREDITS

@@ -99,7 +99,7 @@ E: Marek.Biskup@cern.ch
 D: PROOF contributions
 
 N: Brian Bockelman
-E: bbockelm@math.unl.edu
+E: bbockelm@cse.unl.edu
 D: THDFSFile for accessing the Hadoop file system
 D: Improvement to ROOT I/O disk and memory efficiency.