Updating CREDITS.TXT

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@171347 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CREDITS.TXT b/CREDITS.TXT
index b96585c..544138d 100644
--- a/CREDITS.TXT
+++ b/CREDITS.TXT
@@ -74,6 +74,10 @@
 N: Richard Smith
 D: Minor patches.
 
+N: Klaas de Vries
+E: klaas at klaasgaaf dot nl
+D: Minor bug fix.
+
 N: Zhang Xiongpang
 E: zhangxiongpang@gmail.com
 D: Minor patches and bug fixes.