Update appveyor.yml to configure git to disable line endings normalization

appveyor.yml

@@ -17,6 +17,7 @@ after_build:
   - ps: |
         if(-Not $env:APPVEYOR_PULL_REQUEST_TITLE)
         {
+            git config --global core.autocrlf false
             git config --global credential.helper store
             Add-Content "$env:USERPROFILE\.git-credentials" "https://$($env:access_token):x-oauth-basic@github.com`n"
             git config --global user.email $env:op_build_user_email