<rdar://problem/16780403> REGRESSION: Plugin tests failing on Mac/WebKit1.

* WebKit.xcodeproj/project.pbxproj: Keep the WebKitPluginHost.app symlink in
WebKit.framework for now.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@168093 268f45cc-cd09-0410-ab3c-d52691b4dbfc