update CI to .NET SDK 2.0 preview2

Author: caleblloyd

.ci/build.ps1

@@ -31,7 +31,7 @@ function DownloadWithRetry([string] $url, [string] $downloadLocation, [int] $ret
 $repoFolder = Join-Path $PSScriptRoot ..
 $env:REPO_FOLDER = $repoFolder
 
-$koreBuildZip="https://github.com/aspnet/KoreBuild/archive/rel/2.0.0-preview1.zip"
+$koreBuildZip="https://github.com/aspnet/KoreBuild/archive/rel/2.0.0-preview2.zip"
 if ($env:KOREBUILD_ZIP)
 {
     $koreBuildZip=$env:KOREBUILD_ZIP
@@ -63,7 +63,7 @@ if (!(Test-Path $buildFolder)) {
 
 $dotnetArch = 'x64'
 $dotnetChannel = "preview"
-$dotnetVersion = "2.0.0-preview1-005957"
+$dotnetVersion = "2.0.0-preview2-006497"
 
 $dotnetLocalInstallFolder = $env:DOTNET_INSTALL_DIR
 if (!$dotnetLocalInstallFolder)

.travis.yml

@@ -21,7 +21,7 @@ before_install:
 - sudo sh -c 'echo "deb [arch=amd64] https://apt-mo.trafficmanager.net/repos/dotnet-release/ trusty main" > /etc/apt/sources.list.d/dotnetdev.list'
 - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 417A0893
 - sudo apt-get update
-- sudo apt-get install -y dotnet-dev-2.0.0-preview1-005977 dotnet-sharedframework-microsoft.netcore.app-1.1.2
+- sudo apt-get install -y dotnet-sdk-2.0.0-preview2-006497 dotnet-sharedframework-microsoft.netcore.app-1.1.2
 
 script:
 - dotnet restore