Add ability to remote access to AppVeyor [win build]

Author: sergeyklay

.appveyor.yml

@@ -59,6 +59,7 @@ init:
     - SET PATH=C:\Program Files (x86)\Microsoft Visual Studio %PHP_VC%.0\VC;C:\Program Files (x86)\Microsoft Visual Studio %PHP_VC%.0\VC\bin;%PATH%
     - SET ANSICON=121x90 (121x90)
     - ps: IF ($env:APPVEYOR_REPO_BRANCH -eq "development") {$env:APPVEYOR_CACHE_SKIP_SAVE = "true"}
+    - ps: iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
 
 os: Windows Server 2012 R2