[TD-3988]add mac test on Appveyor

.appveyor.yml

@@ -1,10 +1,20 @@
 version: 1.0.{build}
-os: Visual Studio 2015
+image: 
+  - Visual Studio 2015
+  - macos-mojave
 environment:
   matrix:
     - ARCH: amd64
     - ARCH: x86
-
+matrix:
+  exclude:
+    - image: macos-mojave
+      ARCH: x86
+for:
+  - 
+    matrix:
+      only:
+        - image: Visual Studio 2015
     clone_folder: c:\dev\TDengine
     clone_depth: 1
 
@@ -19,12 +29,21 @@ build_script:
       - cd build
       - cmake -G "NMake Makefiles" ..
       - nmake install
+  -
+    matrix:
+      only:
+        - image: macos-mojave
+    clone_depth: 1
 
+    build_script:
+      - mkdir debug
+      - cd debug
+      - cmake .. > /dev/null
+      - make > /dev/null
 notifications:
 - provider: Email
   to:
   - sangshuduo@gmail.com
-  
   on_build_success: true
   on_build_failure: true
   on_build_status_changed: true