Attempt to add MacOS pipelines support.

Author: BillyONeal

azure-pipelines.yml

@@ -39,3 +39,19 @@ jobs:
         cd build.release
         ninja -j 2
       displayName: 'Run ninja'
+  - job: MacOS_Debug
+    pool:
+      vmImage: 'macOS-10.13'
+    steps:
+    - script: brew install boost openssl ninja
+      displayName: Berw install dependencies
+    - script: mkdir build.debug
+      displayName: Make build.debug
+    - task: CMake@1
+      inputs:
+        workingDirectory: 'build.debug'
+        cmakeArgs: '-G Ninja -DCMAKE_BUILD_TYPE=Debug ..'
+    - script: |
+        cd build.debug
+        ninja -j 2
+      displayName: 'Run ninja'