Remove safe_iop_test from tests build
diff --git a/testsuite/Android.mk b/testsuite/Android.mk
index 6cc2334..942ae91 100644
--- a/testsuite/Android.mk
+++ b/testsuite/Android.mk
@@ -23,7 +23,7 @@
 LOCAL_CFLAGS := -DSAFE_IOP_TEST=1 -DNDEBUG=1
 
 LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES)
-LOCAL_MODULE_TAGS := tests
+LOCAL_MODULE_TAGS := optional
 
 LOCAL_MODULE := safe_iop_test