Link to libsnapshot_cow and libz where libsnapshot is linked. am: 6c190a2d71

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/1443597

Change-Id: I59c0370c738c83be5e4d4ba35c5a1e4acf7d7935
diff --git a/Android.bp b/Android.bp
index 27ba172..52019b6 100644
--- a/Android.bp
+++ b/Android.bp
@@ -203,6 +203,8 @@
         "libgsi",
         "libpayload_consumer",
         "libsnapshot",
+        "libsnapshot_cow",
+        "libz",
         "update_metadata-protos",
     ],
     shared_libs: [