libotutil: Add API to create an "ay" GVariant from GBytes

We used to have a version of this, but since I'm trying to use
GBytes more, this became a more common operation, and it's annoying
to type out the whole G_VARIANT_TYPE ("ay") each time, and pass
TRUE for trusted.

https://bugzilla.gnome.org/show_bug.cgi?id=706031

src/libotutil/ot-variant-utils.c

@@ -41,6 +41,12 @@ ot_gvariant_new_bytearray (const guchar   *data,
   return ret;
 }
 
+GVariant *
+ot_gvariant_new_ay_bytes (GBytes *bytes)
+{
+  return g_variant_new_from_bytes (G_VARIANT_TYPE ("ay"), bytes, TRUE);
+}
+
 GHashTable *
 ot_util_variant_asv_to_hash_table (GVariant *variant)
 {

src/libotutil/ot-variant-utils.h

@@ -29,6 +29,8 @@ G_BEGIN_DECLS
 GVariant *ot_gvariant_new_bytearray (const guchar   *data,
                                      gsize           len);
 
+GVariant *ot_gvariant_new_ay_bytes (GBytes *bytes);
+
 GHashTable *ot_util_variant_asv_to_hash_table (GVariant *variant);
 
 GVariant * ot_util_variant_take_ref (GVariant *variant);