add msvc build to msvc branch (#728)

.appveyor.yml

@@ -22,6 +22,7 @@ environment:
           CYG_SETUP: setup-x86.exe
           BASH: C:\cygwin\bin\bash
           CC: gcc
+        - CC: msvc
 
 # Cache Cygwin/MSYS files to speed up build
 cache:
@@ -44,6 +45,7 @@ install:
 build_script:
     - if defined BASH (%BASH% -lc "cd $(cygpath ${APPVEYOR_BUILD_FOLDER}) && make")
     - if "%MSYSTEM%" == "MINGW64" (%BASH% -lc "cd $(cygpath ${APPVEYOR_BUILD_FOLDER}) && make -C bindings/go")
+    - if "%CC%" == "msvc" (msbuild %APPVEYOR_BUILD_FOLDER%/msvc/msvc.sln)
     # make test
     #- 'cd %APPVEYOR_BUILD_FOLDER% && cd bindings\dotnet && msbuild UnicornDotNet.sln'
 # Allows RDP