Fix local pack builds

Local dev boxes  were failing to build the `pack` target because symbols are now embedded into the assembly in that configuration and thus there were no pdb files to include in the snupkg file.

Directory.Build.props

@@ -23,7 +23,7 @@
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
-    <IncludeSymbols>true</IncludeSymbols>
+    <IncludeSymbols Condition=" '$(DebugType)' != 'embedded' ">true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
   </PropertyGroup>