Add longPathAware manifest to enable long paths on Windows

Fixes: #1900

Author: cristianadam

windows/ninja.manifest

@@ -3,6 +3,7 @@
   <application>
     <windowsSettings>
       <activeCodePage xmlns="http://schemas.microsoft.com/SMI/2019/WindowsSettings">UTF-8</activeCodePage>
+      <longPathAware  xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">true</longPathAware>
     </windowsSettings>
   </application>
 </assembly>