add an icon to the virginradio module

modules/virginradio/favicon.licence

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+favicon.png is licenced under the Créative Commons Attribution-Share Alike 4.0
+International licence
+
+Original picture attribution: © Hans Hillewaert
+
+You are free to:
+    Share — copy and redistribute the material in any medium or format Adapt —
+    remix, transform, and build upon the material for any purpose, even
+    commercially.
+    The licensor cannot revoke these freedoms as long as you follow the license
+    terms.
+
+Under the following terms:
+    Attribution — You must give appropriate credit, provide a link to the
+    license, and indicate if changes were made. You may do so in any reasonable
+    manner, but not in any way that suggests the licensor endorses you or your
+    use.
+    ShareAlike — If you remix, transform, or build upon the material, you must
+    distribute your contributions under the same license as the original.
+    No additional restrictions — You may not apply legal terms or technological
+    measures that legally restrict others from doing anything the license
+    permits.