test: rules.mk: avb_test host test add unittest dep

Bug: 368823731
Change-Id: I86d21e85ed81408a0d0423c9c66fafb641d0caf5
diff --git a/test/rules.mk b/test/rules.mk
index aa2e382..4895704 100644
--- a/test/rules.mk
+++ b/test/rules.mk
@@ -33,4 +33,8 @@
 HOST_LIBS := \
 	stdc++ \
 
+HOST_DEPS := \
+	trusty/user/base/host/unittest \
+
+
 include make/host_test.mk