Update CoreFx to preview3-26326-03 (#17222)

Author: dotnet-maestro-bot

dependencies.props

@@ -23,16 +23,16 @@
 
   <!-- Source of truth for dependency tooling: the commit hash of the dotnet/versions master branch as of the last auto-upgrade. -->
   <PropertyGroup>
-    <CoreFxCurrentRef>d2563d3a72fd072e656e1a2806f5cd14fabcca2a</CoreFxCurrentRef>
+    <CoreFxCurrentRef>64cd7256fa7fa2a124d7d2d86bb1cf500bf515a2</CoreFxCurrentRef>
     <CoreClrCurrentRef>9171e74940c4ce8054acd8995f93a096c613dafa</CoreClrCurrentRef>
     <BuildToolsCurrentRef>7f2023d4b56b28175c9d7d07a8359cf7e0a131be</BuildToolsCurrentRef>
     <PgoDataCurrentRef>553f30357d08df4ed6d32f70f3478a76f5db79c2</PgoDataCurrentRef>
   </PropertyGroup>
 
   <!-- Tests/infrastructure dependency versions. -->
   <PropertyGroup>
-    <MicrosoftPrivateCoreFxNETCoreAppPackageVersion>4.5.0-preview3-26326-01</MicrosoftPrivateCoreFxNETCoreAppPackageVersion>
-    <MicrosoftNETCorePlatformsPackageVersion>2.1.0-preview3-26326-01</MicrosoftNETCorePlatformsPackageVersion>
+    <MicrosoftPrivateCoreFxNETCoreAppPackageVersion>4.5.0-preview3-26326-03</MicrosoftPrivateCoreFxNETCoreAppPackageVersion>
+    <MicrosoftNETCorePlatformsPackageVersion>2.1.0-preview3-26326-03</MicrosoftNETCorePlatformsPackageVersion>
     <PgoDataPackageVersion>99.99.99-master-20180228-0037</PgoDataPackageVersion>
     <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>2.1.0-preview3-26323-05</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
     <XunitPackageVersion>2.2.0-beta2-build3300</XunitPackageVersion>