Update dependencies from https://github.com/dotnet/arcade build 20190215.1 (#359)

This change updates the following dependencies
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19115.1

eng/Version.Details.xml

@@ -47,9 +47,9 @@
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.19114.4">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.19115.1">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>03497f16b93264158c28cee4eea767b53bc750f5</Sha>
+      <Sha>75af3cdef5022dbb92b8a94388198a6fd59a5d94</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>

global.json

@@ -9,6 +9,6 @@
     "version": "3.0.100-preview-010024"
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.19114.4"
+    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.19115.1"
   }
 }