Update BuildTools, CoreClr, CoreFx, PgoData to prerelease-02012-02, preview1-25713-01, preview1-25712-02, master-20170912-0038, respectively (#13928)

Author: dotnet-maestro-bot

BuildToolsVersion.txt

@@ -1 +1 @@
-2.0.0-prerelease-02007-01
+2.0.0-prerelease-02012-02

dependencies.props

@@ -13,22 +13,22 @@
 
   <!-- Source of truth for dependency tooling: the commit hash of the dotnet/versions master branch as of the last auto-upgrade. -->
   <PropertyGroup>
-    <CoreFxCurrentRef>13b5345991e55bb0b30a236ab4f6693a870ed789</CoreFxCurrentRef>
-    <CoreClrCurrentRef>016946e95466db8aacaf2a18643352215778c54d</CoreClrCurrentRef>
-    <BuildToolsCurrentRef>7c9088cd9078e1d90be01eb94a3f66ba0a33c9f4</BuildToolsCurrentRef>
-    <PgoDataCurrentRef>d406f4669b4849df27d4f1ab30e78b72a657f246</PgoDataCurrentRef>
+    <CoreFxCurrentRef>ab762a3c35e208cd698988fb7761bc92be417be9</CoreFxCurrentRef>
+    <CoreClrCurrentRef>ab762a3c35e208cd698988fb7761bc92be417be9</CoreClrCurrentRef>
+    <BuildToolsCurrentRef>ab762a3c35e208cd698988fb7761bc92be417be9</BuildToolsCurrentRef>
+    <PgoDataCurrentRef>ab762a3c35e208cd698988fb7761bc92be417be9</PgoDataCurrentRef>
   </PropertyGroup>
 
   <!-- Auto-upgraded properties for each build info dependency. -->
   <PropertyGroup>
-    <CoreFxPackageVersion>4.5.0-preview2-25707-02</CoreFxPackageVersion>
-    <PlatformPackageVersion>2.1.0-preview2-25707-02</PlatformPackageVersion>
-    <PgoDataPackageVersion>99.99.99-master-20170911-0041</PgoDataPackageVersion>
+    <CoreFxPackageVersion>4.5.0-preview1-25712-02</CoreFxPackageVersion>
+    <PlatformPackageVersion>2.1.0-preview1-25712-02</PlatformPackageVersion>
+    <PgoDataPackageVersion>99.99.99-master-20170912-0038</PgoDataPackageVersion>
   </PropertyGroup>
 
   <!-- Full package version strings that are used in other parts of the build. -->
   <PropertyGroup>
-    <CoreClrPackageVersion>2.1.0-preview2-25711-01</CoreClrPackageVersion>
+    <CoreClrPackageVersion>2.1.0-preview1-25713-01</CoreClrPackageVersion>
     <XunitPackageVersion>2.2.0-beta2-build3300</XunitPackageVersion>
     <XUnitConsoleNetCoreVersion>1.0.2-prerelease-00177</XUnitConsoleNetCoreVersion>
     <XUnitPerformanceApiVersion>1.0.0-beta-build0007</XUnitPerformanceApiVersion>