Update dependencies from https://github.com/dotnet/roslyn build 20190912.11 (#2350)

- Microsoft.Net.Compilers.Toolset - 3.3.1-beta4-19462-11

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -92,9 +92,9 @@
       <Uri>https://github.com/dotnet/corefx</Uri>
       <Sha>4ac4c0367003fe3973a3648eb0715ddb0e3bbcea</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="3.3.1-beta3-19456-04">
+    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="3.3.1-beta4-19462-11">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>d5ed75034c31f9491d8da1cdfb10fa91b1af52a9</Sha>
+      <Sha>66a912c9463eebe832cf742d2fe8bb2e1a4600ec</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>

eng/Versions.props

@@ -68,7 +68,7 @@
     <!-- Packages from dotnet/arcade -->
     <MicrosoftDotNetGenAPIPackageVersion>1.0.0-beta.19461.7</MicrosoftDotNetGenAPIPackageVersion>
     <!-- Packages from dotnet/roslyn -->
-    <MicrosoftNetCompilersToolsetVersion>3.3.1-beta3-19456-04</MicrosoftNetCompilersToolsetVersion>
+    <MicrosoftNetCompilersToolsetVersion>3.3.1-beta4-19462-11</MicrosoftNetCompilersToolsetVersion>
   </PropertyGroup>
   <PropertyGroup Label="Dependency version settings">
     <!--