Update dependencies from https://github.com/dotnet/winforms build 20191211.1 (#2308)

- Microsoft.Private.Winforms - 5.0.0-alpha1.19611.1

eng/Version.Details.xml

 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.Private.Winforms" Version="5.0.0-alpha1.19610.4">
+    <Dependency Name="Microsoft.Private.Winforms" Version="5.0.0-alpha1.19611.1">
       <Uri>https://github.com/dotnet/winforms</Uri>
-      <Sha>1cfb75cf1b4b15309850d4003f6c683eadd9604c</Sha>
+      <Sha>5d79f3e58f6ef8359aab26ee3535c7c11a343892</Sha>
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>

eng/Versions.props

@@ -9,7 +9,7 @@
   </PropertyGroup>
   <!-- NuGet Package Versions -->
   <PropertyGroup>
-    <MicrosoftPrivateWinformsVersion>5.0.0-alpha1.19610.4</MicrosoftPrivateWinformsVersion>
+    <MicrosoftPrivateWinformsVersion>5.0.0-alpha1.19611.1</MicrosoftPrivateWinformsVersion>
   </PropertyGroup>
   <!-- Packages that come from https://github.com/dotnet/coreclr -->
   <PropertyGroup>

global.json

@@ -20,6 +20,6 @@
     "net-framework-48-ref-assemblies": "0.0.0.1",
     "dotnet-api-docs_netcoreapp3.0": "0.0.0.2",
     "msvcurt-c1xx": "0.0.0.8",
-    "net-framework-472-iltools":  "0.0.0.1"
+    "net-framework-472-iltools": "0.0.0.1"
   }
 }