CSHARP-3994: Consider adding EmbedUntrackedSources for a build process (#1272)

Author: sanych-sun

evergreen/build-packages.sh

@@ -9,4 +9,4 @@ fi
 echo Creating nuget package...
 
 dotnet clean ./CSharpDriver.sln
-dotnet pack ./CSharpDriver.sln -o ./artifacts/nuget -c Release -p:Version="$PACKAGE_VERSION" --include-symbols -p:SymbolPackageFormat=snupkg
+dotnet pack ./CSharpDriver.sln -o ./artifacts/nuget -c Release -p:Version="$PACKAGE_VERSION" --include-symbols -p:SymbolPackageFormat=snupkg -p:ContinuousIntegrationBuild=true

src/Directory.Build.props

@@ -24,6 +24,7 @@
     <IncludeSymbols>true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Version)'==''">