Update dependencies from https://github.com/dotnet/winforms build 20200214.1 (#2580)

- Microsoft.Private.Winforms - 5.0.0-preview.1.20114.1

eng/Version.Details.xml

 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.Private.Winforms" Version="5.0.0-preview.1.20114.2">
+    <Dependency Name="Microsoft.Private.Winforms" Version="5.0.0-preview.1.20114.1">
       <Uri>https://github.com/dotnet/winforms</Uri>
-      <Sha>e412d3acf79695124ce7ebc8907b213550c97b04</Sha>
+      <Sha>bf224362d5c5206144ce5486615e2022d9b17762</Sha>
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>

eng/Versions.props

@@ -9,7 +9,7 @@
   </PropertyGroup>
   <!-- NuGet Package Versions -->
   <PropertyGroup>
-    <MicrosoftPrivateWinformsVersion>5.0.0-preview.1.20114.2</MicrosoftPrivateWinformsVersion>
+    <MicrosoftPrivateWinformsVersion>5.0.0-preview.1.20114.1</MicrosoftPrivateWinformsVersion>
   </PropertyGroup>
   <!-- Packages that come from https://github.com/dotnet/coreclr -->
   <PropertyGroup>