Fix braino in Makefile.

Change-Id: I7cbf694f35db97946823de148ff6dd6053091de6
diff --git a/test/Android.run-test.mk b/test/Android.run-test.mk
index d05c9c9..1d5e661 100644
--- a/test/Android.run-test.mk
+++ b/test/Android.run-test.mk
@@ -367,6 +367,7 @@
         run_test_options += --relocate --prebuild
         ifneq ($(ART_TEST_RUN_TEST_PREBUILD),true)
           skip_test := true
+        endif
       endif
     endif
   endif