Add NSSupportsAppNap keys to WebProcess, PluginProcess
https://bugs.webkit.org/show_bug.cgi?id=117528

Reviewed by Mark Rowe.

* PluginProcess/EntryPoint/mac/LegacyProcess/Info.plist:
* PluginProcess/EntryPoint/mac/XPCService/PluginService.32-64.Info.plist:
* PluginProcess/EntryPoint/mac/XPCService/PluginService.Development/Info.plist:
* WebProcess/EntryPoint/mac/LegacyProcess/Info.plist:
* WebProcess/EntryPoint/mac/XPCService/WebContentService.Development/Info.plist:
* WebProcess/EntryPoint/mac/XPCService/WebContentService/Info.plist:
    - add NSSupportsAppNap key.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@151484 268f45cc-cd09-0410-ab3c-d52691b4dbfc