Bug 1306650 - part 3 - add clang-cl toolchain builds; r=dustin

The build-clang-windows.sh is basically an exact copy of the Linux one
at the moment; we'll fix it up for all the Windows-specific taskcluster
bits in a future commit.

taskcluster/ci/toolchain/kind.yml

@@ -11,3 +11,4 @@ transforms:
 
 jobs-from:
    - linux.yml
+   - windows.yml

taskcluster/ci/toolchain/windows.yml

@@ -0,0 +1,22 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+win32-clang-cl/opt:
+    description: "Clang-cl toolchain build"
+    treeherder:
+        kind: build
+        platform: windows-2012-32/opt
+        symbol: Cc(ClangCL)
+        tier: 2
+    worker-type: aws-provisioner-v1/gecko-{level}-b-win2012
+    worker:
+        implementation: generic-worker
+        max-run-time: 36000
+    run:
+        using: toolchain-script
+        script: build-clang-windows.sh
+    when:
+        files-changed:
+            - 'build/build-clang/**'
+            - 'taskcluster/scripts/misc/build-clang-windows.sh'

taskcluster/scripts/misc/build-clang-windows.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+set -x -e -v
+
+# This script is for building clang-cl on Windows.
+
+# Fetch our toolchain from tooltool.
+wget -O tooltool.py ${TOOLTOOL_REPO}/raw/${TOOLTOOL_REV}/tooltool.py
+chmod +x tooltool.py
+: TOOLTOOL_CACHE                ${TOOLTOOL_CACHE:=/home/worker/tooltool-cache}
+export TOOLTOOL_CACHE
+
+TOOLTOOL_AUTH_FILE=/c/builds/relengapi.tok
+if [ ! -e ${TOOLTOOL_AUTH_FILE} ]; then
+    echo cannot find ${TOOLTOOL_AUTH_FILE}
+    exit 1
+fi
+
+TOOLTOOL_MANIFEST=build/src/browser/config/tooltool-manifests/win32/releng.manifest
+./tooltool.py --authentication-file="${TOOLTOOL_AUTH_FILE}" -m "${TOOLTOOL_MANIFEST}" fetch
+
+# gets a bit too verbose here
+set +x
+
+cd build/src/build/build-clang
+/c/mozilla-build/python/python.exe ./build-clang.py -c clang-static-analysis-win32.json
+
+set -x
+
+# Put a tarball in the artifacts dir
+mkdir -p ${UPLOAD_PATH}
+cp clang.tar.* ${UPLOAD_PATH}