Actually install the shared runtime specified in the file

build/KoreBuild.ps1

@@ -53,8 +53,7 @@ else
 {
     # Install the version of dotnet-cli used to compile
     & "$koreBuildFolder\dotnet\dotnet-install.ps1" -Channel $dotnetChannel -Version $dotnetVersion -Architecture x64
-    InstallSharedRuntime '1.1.0' 'release/1.1.0'
-    InstallSharedRuntime '1.1.1' 'release/1.1.0'
+    InstallSharedRuntime $sharedRuntimeVersion 'release/1.1.0'
     InstallSharedRuntime '1.0.4' 'preview'
 
     Write-Host ''

build/KoreBuild.sh

@@ -66,8 +66,7 @@ else
 
     # Install the version of dotnet-cli used to compile
     $koreBuildFolder/dotnet/dotnet-install.sh --channel $KOREBUILD_DOTNET_CHANNEL --version $KOREBUILD_DOTNET_VERSION
-    install_shared_runtime '1.1.0' 'release/1.1.0'
-    install_shared_runtime '1.1.1' 'release/1.1.0'
+    install_shared_runtime $sharedRuntimeVersion 'release/1.1.0'
     install_shared_runtime '1.0.4' 'preview'
 
     # Add .NET installation directory to the path if it isn't yet included.