Make avb_bindgen host supported

libavb is host supported so make the bindings be the same.

Change-Id: I542d42ad076bcff43f1a53e73ed2cd869cc5fee8
diff --git a/libs/avb_bindgen/Android.bp b/libs/avb_bindgen/Android.bp
index 1035498..1e62864 100644
--- a/libs/avb_bindgen/Android.bp
+++ b/libs/avb_bindgen/Android.bp
@@ -4,6 +4,7 @@
 
 rust_bindgen {
     name: "libavb_bindgen",
+    host_supported: true,
     wrapper_src: "bindgen/avb.h",
     crate_name: "avb_bindgen",
     source_stem: "bindings",