Allow warnings in some rust modules.

Bug: 141699953
Test: mm in projects with Rust modules
Change-Id: If8ea104fbcee00532980a254fd3586abdde44d42
diff --git a/Android.bp b/Android.bp
index 97df3f1..af5bf5e 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,5 +1,6 @@
 rust_library_rlib {
     name: "libquote",
+    deny_warnings: false,
     host_supported: true,
     crate_name: "quote",
     srcs: ["src/lib.rs"],