Add an entry in CREDITS.TXT

llvm-svn: 165949
diff --git a/libcxx/CREDITS.TXT b/libcxx/CREDITS.TXT
index 336edde..f2ca38f 100644
--- a/libcxx/CREDITS.TXT
+++ b/libcxx/CREDITS.TXT
@@ -70,3 +70,7 @@
 N: Holger Arnold
 E: [email protected]
 D: Minor fix.
+
+N: Argyrios Kyrtzidis
+E: [email protected]
+D: Bug fixes.