Update to latest from mono/cecil - brings fix for #2203 (#2384)

vitek-karas · web-flow · commit 4f4a670a10d3 · 2021-11-18T09:16:28.000-08:00
The new Cecil fixes the deterministic MVID and PDB checksum. Details in dotnet/cecil#31.
diff --git a/external/cecil b/external/cecil
@@ -1 +1 @@
-Subproject commit 3bef7fc7b7910f826790ebfeccb381b76a650571
+Subproject commit ff616bf90e3aff2292a0b1536f7af13cd8810276
