[DO NOT MERGE] enable mingw builder on try

Author: Mark-Simulacrum

src/ci/azure-pipelines/try.yml

@@ -49,25 +49,15 @@ jobs:
 #         NO_LLVM_ASSERTIONS: 1
 #         NO_DEBUG_ASSERTIONS: 1
 #
-# - job: Windows
-#   timeoutInMinutes: 600
-#   pool:
-#     vmImage: 'vs2017-win2016'
-#   steps:
-#   - template: steps/run.yml
-#   strategy:
-#     matrix:
-#       dist-x86_64-msvc:
-#         RUST_CONFIGURE_ARGS: >
-#           --build=x86_64-pc-windows-msvc
-#           --target=x86_64-pc-windows-msvc,aarch64-pc-windows-msvc
-#           --enable-full-tools
-#           --enable-profiler
-#         SCRIPT: python x.py dist
-#         DIST_REQUIRE_ALL_TOOLS: 1
-#         DEPLOY: 1
-#
-#       dist-x86_64-msvc-alt:
-#         RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --enable-extended --enable-profiler
-#         SCRIPT: python x.py dist
-#         DEPLOY_ALT: 1
+- job: Windows
+  timeoutInMinutes: 600
+  pool:
+    vmImage: 'vs2017-win2016'
+  steps:
+  - template: steps/run.yml
+  strategy:
+    matrix:
+      i686-mingw-2:
+        RUST_CONFIGURE_ARGS: --build=i686-pc-windows-gnu
+        SCRIPT: make ci-mingw-subset-2
+        CUSTOM_MINGW: 1