Update dependencies from https://github.com/dotnet/roslyn build 20200220.8 (#3002)

- Microsoft.Net.Compilers.Toolset - 3.4.1-beta4-20120-08

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -101,9 +101,9 @@
       <Uri>https://github.com/dotnet/arcade</Uri>
       <Sha>15f00efd583eab4372b2e9ca25bd80ace5b119ad</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="3.4.1-beta4-19614-01">
+    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="3.4.1-beta4-20120-08">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>165046097562cfe65b09c2e9a9d8f7cd88526f2c</Sha>
+      <Sha>fa984e0202af4480c0273032da49cbbdeb32c582</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>

eng/Versions.props

@@ -77,7 +77,7 @@
     <!-- Packages from dotnet/arcade -->
     <MicrosoftDotNetGenAPIPackageVersion>1.0.0-beta.20113.5</MicrosoftDotNetGenAPIPackageVersion>
     <!-- Packages from dotnet/roslyn -->
-    <MicrosoftNetCompilersToolsetVersion>3.4.1-beta4-19614-01</MicrosoftNetCompilersToolsetVersion>
+    <MicrosoftNetCompilersToolsetVersion>3.4.1-beta4-20120-08</MicrosoftNetCompilersToolsetVersion>
   </PropertyGroup>
   <PropertyGroup Label="Dependency version settings">
     <!--