Merge pull request #2814 from wiredfool/appveyor

Quick and Dirty fix for msys2 on appveyor

appveyor.yml

@@ -69,6 +69,7 @@ build_script:
         $host.SetShouldExit(0)  
       }
 - cd c:\pillow
+- mv PIL PIL.temp
 - '%PYTHON%\%EXECUTABLE% selftest.py --installed'
 
 test_script:
@@ -86,6 +87,8 @@ artifacts:
   name: wheel
 
 before_deploy:
+  - cd c:\pillow
+  - mv PIL.temp PIL
   - '%PYTHON%\%PIP_DIR%\pip.exe install wheel'
   - cd c:\pillow\winbuild\
   - '%PYTHON%\%EXECUTABLE% c:\pillow\winbuild\build.py --wheel'