Add an option to run art tests with strace.

Bug: 19894268
Change-Id: I0a315a30e4e7d6d497b21205dc2a2b18b2170328
diff --git a/test/Android.run-test.mk b/test/Android.run-test.mk
index 38973f7..ee6c2ef 100644
--- a/test/Android.run-test.mk
+++ b/test/Android.run-test.mk
@@ -615,6 +615,9 @@
   else
     run_test_options += --build-with-javac-dx
   endif
+  ifeq ($(ART_TEST_WITH_STRACE),true)
+    run_test_options += --strace
+  endif
   ifeq ($(ART_TEST_RUN_TEST_ALWAYS_CLEAN),true)
     run_test_options += --always-clean
   endif