Support for CONST_STRING in optimizing compiler.

Change-Id: Iab8517bdadd1d15ffbe570010f093660be7c51aa
diff --git a/test/Android.run-test.mk b/test/Android.run-test.mk
index b281110..bd18c4e 100644
--- a/test/Android.run-test.mk
+++ b/test/Android.run-test.mk
@@ -346,6 +346,7 @@
   415-optimizing-arith-neg \
   416-optimizing-arith-not \
   417-optimizing-arith-div \
+  418-const-string \
   419-long-parameter \
   700-LoadArgRegs \
   702-LargeBranchOffset \