Update CREDITS.TXT

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@160812 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CREDITS.TXT b/CREDITS.TXT
index 9374124..60649cc 100644
--- a/CREDITS.TXT
+++ b/CREDITS.TXT
@@ -50,3 +50,7 @@
 
 N: Richard Smith
 D: Minor patches.
+
+N: Andrew Morrow
+E: andrew.c.morrow@gmail.com
+D: Minor patches and Linux fixes.