Updating the credits after r158717

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158718 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CREDITS.TXT b/CREDITS.TXT
index 6b10a0d..67bbae4 100644
--- a/CREDITS.TXT
+++ b/CREDITS.TXT
@@ -19,6 +19,10 @@
 D: LCSSA pass and related LoopUnswitch work
 D: GVNPRE pass, TargetData refactoring, random improvements
 
+N: Aaron Ballman
+E: aaron@aaronballman.com
+D: __declspec attributes, Windows support, general bug fixing
+
 N: Henrik Bach
 D: MingW Win32 API portability layer