Update CoreClr, CoreFx to servicing-27817-01, servicing-27818-01, respectively (#25618)

Author: dotnet-maestro-bot

ILAsmVersion.txt

@@ -1 +1 @@
-2.1.11-servicing-27617-04
+2.1.12-servicing-27817-01

dependencies.props

@@ -23,18 +23,18 @@
 
   <!-- Source of truth for dependency tooling: the commit hash of the dotnet/versions master branch as of the last auto-upgrade. -->
   <PropertyGroup>
-    <CoreFxCurrentRef>eaad8dfebf7aba22e41df2d528157b4e285e2a23</CoreFxCurrentRef>
-    <CoreClrCurrentRef>eaad8dfebf7aba22e41df2d528157b4e285e2a23</CoreClrCurrentRef>
+    <CoreFxCurrentRef>e836f21832aee24f6c513485b81fb84285c7c59d</CoreFxCurrentRef>
+    <CoreClrCurrentRef>e836f21832aee24f6c513485b81fb84285c7c59d</CoreClrCurrentRef>
     <BuildToolsCurrentRef>24c595e6e7849f2a156fef8247899ef63efb3e70</BuildToolsCurrentRef>
     <PgoDataCurrentRef>ed075a5a9794917dd978c9ad465edd985d7f26d2</PgoDataCurrentRef>
   </PropertyGroup>
 
   <!-- Tests/infrastructure dependency versions. -->
   <PropertyGroup>
-    <MicrosoftPrivateCoreFxNETCoreAppPackageVersion>4.5.0-servicing-27617-02</MicrosoftPrivateCoreFxNETCoreAppPackageVersion>
-    <MicrosoftNETCorePlatformsPackageVersion>2.1.4</MicrosoftNETCorePlatformsPackageVersion>
+    <MicrosoftPrivateCoreFxNETCoreAppPackageVersion>4.5.0-servicing-27818-01</MicrosoftPrivateCoreFxNETCoreAppPackageVersion>
+    <MicrosoftNETCorePlatformsPackageVersion>2.1.5</MicrosoftNETCorePlatformsPackageVersion>
     <PgoDataPackageVersion>2.1.0-release-20180912-0055</PgoDataPackageVersion>
-    <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>2.1.11-servicing-27617-04</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
+    <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>2.1.12-servicing-27817-01</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
     <XunitPackageVersion>2.2.0-beta2-build3300</XunitPackageVersion>
     <XunitConsoleNetcorePackageVersion>1.0.2-prerelease-00177</XunitConsoleNetcorePackageVersion>
     <XunitPerformanceApiPackageVersion>1.0.0-beta-build0015</XunitPerformanceApiPackageVersion>