tests: Add testcase for ZipUtil.

Test: recovery_unit_test passes.
Change-Id: I8ad364e88aaee31579ed7206aad8e5620518d797
diff --git a/tests/Android.mk b/tests/Android.mk
index 8ae52d7..effed83 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -35,7 +35,8 @@
     unit/asn1_decoder_test.cpp \
     unit/locale_test.cpp \
     unit/sysutil_test.cpp \
-    unit/zip_test.cpp
+    unit/zip_test.cpp \
+    unit/ziputil_test.cpp
 
 LOCAL_C_INCLUDES := bootable/recovery
 LOCAL_SHARED_LIBRARIES := liblog