Attempt to fix strong-name signing (#227)

* Attempt to fix strong-name signing

* Update eng/Signing.props to use the cecil.snk file

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Co-authored-by: Jackson Schuster <36744439+jtschuster@users.noreply.github.com>
(cherry picked from commit 7f4a146)

Author: 2 people

eng/Signing.props

@@ -12,4 +12,7 @@
     <FileSignInfo Include="Mono.Cecil.Mdb.dll" CertificateName="3PartySHA2" />
     <FileSignInfo Include="Mono.Cecil.Pdb.dll" CertificateName="3PartySHA2" />
   </ItemGroup>
+  <ItemGroup>
+    <StrongNameSignInfo Include="$(MSBuildThisFileDirectory)..\cecil.snk" PublicKeyToken="50cebf1cceb9d05e" CertificateName="CecilStrongName" />
+  </ItemGroup>
 </Project>