Add a Windows builder

Author: alexcrichton

azure-pipelines.yml

@@ -13,6 +13,16 @@ jobs:
 - template: ci/azure-job-test-all.yml
   parameters:
     toolchain: nightly
+- template: ci/azure-job-test-all.yml
+  parameters:
+    os: Windows
+    vmImage: vs2017-win2016
+- template: ci/azure-job-test-all.yml
+  parameters:
+    os: Windows
+    vmImage: vs2017-win2016
+    toolchain: stable-x86_64-gnu
+    name: Windows_x86_64_MinGW
 - job: systest
   steps:
     - template: ci/azure-install-rust.yml

ci/azure-job-test-all.yml

@@ -2,9 +2,10 @@ parameters:
   os: 'Linux'
   toolchain: 'stable'
   vmImage: 'ubuntu-16.04'
+  name: ''
 
 jobs:
-- job: ${{ format('{0}_{1}', parameters.os, parameters.toolchain) }}
+- job: ${{ coalesce(parameters.name, format('{0}_{1}', parameters.os, parameters.toolchain)) }}
   pool:
     vmImage: ${{ parameters.vmImage }}
   steps: