Enable puffin in update_engine

Call the approximate functions to set up the deflates of a zip archive
file. This effectively enables puffdiff when generating an a/b
update package.

Test: Unittests pass. Generate and verify a package on sailfish
Change-Id: Id025c42529b8b9547d4c7d7ac57898450bc6a1c1
diff --git a/Android.mk b/Android.mk
index aa9fb6b..5a3129e 100644
--- a/Android.mk
+++ b/Android.mk
@@ -616,6 +616,7 @@
     liblzma \
     libpayload_consumer \
     libpuffdiff \
+    libz \
     update_metadata-protos \
     $(ue_libpayload_consumer_exported_static_libraries) \
     $(ue_update_metadata_protos_exported_static_libraries)