Add myself to the CREDITS file.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@150935 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CREDITS.TXT b/CREDITS.TXT
index cb9aeee..1256bf1 100644
--- a/CREDITS.TXT
+++ b/CREDITS.TXT
@@ -39,3 +39,8 @@
 
 N: Google Inc.
 D: Copyright owner and contributor of the CityHash algorithm
+
+N: Jeffrey Yasskin
+E: jyasskin@gmail.com
+E: jyasskin@google.com
+D: Linux fixes.