[Windows] Unreviewed Visual Studio 2010 build fixes after r142179.

* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExports.def.in: Correct changed symbols
* JavaScriptCore.vcxproj/JavaScriptCoreExports.def: Removed autogenerated file.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@142181 268f45cc-cd09-0410-ab3c-d52691b4dbfc