Added Louis Gerbarg. Louis is given credit in the CREDITS.TXT file, so I

assume Louis also holds copyright.

llvm-svn: 15534

Author: John Criswell

llvm/lib/Target/PowerPC/LICENSE.TXT

@@ -3,5 +3,5 @@ PowerPC Backend
 The PowerPC Backend is licensed under the Illinois Open Source License and has
 the following additional copyright:
 
-Copyright (C) 2004 Nate Begeman
+Copyright (C) 2004 Nate Begeman and Louis Gerbarg