Update credits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44861 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CREDITS.TXT b/CREDITS.TXT
index 631ceac..2c3a67e 100644
--- a/CREDITS.TXT
+++ b/CREDITS.TXT
@@ -154,6 +154,7 @@
 E: christopher.lamb@gmail.com
 D: aligned load/store support, parts of noalias and restrict support
 D: vreg subreg infrastructure, X86 codegen improvements based on subregs
+D: address spaces
 
 N: Jim Laskey
 E: jlaskey@apple.com