Bump to mono/cecil/master@a6a7f5c0 (#524)

jonathanpeppers · web-flow · commit 7558ca18695e · 2019-11-20T20:07:03.000-06:00
Changes: dotnet/cecil@cb6c1ca...a6a7f5c Context: dotnet/android#3753 We suspect the Xamarin.Android.Cecil.dll produced by Java.Interop is somehow being used by the build. We should update this either way.
diff --git a/external/cecil b/external/cecil
@@ -1 +1 @@
-Subproject commit cb6c1ca9aaef869841bfc3e2e7407b81b979b875
+Subproject commit a6a7f5c0f48c2cbbec699726bbac0816ae097003
