Add self to CREDITS.txt

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@230595 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CREDITS.TXT b/CREDITS.TXT
index c41ee9a..1cf713a 100644
--- a/CREDITS.TXT
+++ b/CREDITS.TXT
@@ -88,6 +88,10 @@
 E: nico.rieck@gmail.com
 D: Windows fixes
 
+N: Jon Roelofs
+E: jonathan@codesourcery.com
+D: Remote testing, Newlib port, baremetal/single-threaded support.
+
 N: Jonathan Sauer
 D: Minor patches, mostly related to constexpr