Update credits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150715 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CREDITS.TXT b/CREDITS.TXT
index 22d7985..3b35cc54 100644
--- a/CREDITS.TXT
+++ b/CREDITS.TXT
@@ -316,6 +316,11 @@
 E: ghost@cs.msu.su
 D: Made inst_iterator behave like a proper iterator, LowerConstantExprs pass
 
+N: Chad Rosier
+E: mcrosier@apple.com
+D: ARM fast-isel improvements
+D: Performance monitoring
+
 N: Roman Samoilov
 E: roman@codedgers.com
 D: MSIL backend