Add a JavaScriptCore Export Generator project.
https://bugs.webkit.org/show_bug.cgi?id=108971.

Reviewed by Brent Fulgham.

* JavaScriptCore.vcxproj/JavaScriptCore.sln:
* JavaScriptCore.vcxproj/JavaScriptCore.vcxproj:
* JavaScriptCore.vcxproj/JavaScriptCore.vcxproj.filters:
* JavaScriptCore.vcxproj/JavaScriptCoreCommon.props:
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator: Added.
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExportGenerator.vcxproj: Added.
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExportGenerator.vcxproj.filters: Added.
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExportGenerator.vcxproj.user: Added.
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExportGeneratorBuildCmd.cmd: Added.
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExportGeneratorCommon.props: Added.
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExportGeneratorDebug.props: Added.
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExportGeneratorPostBuild.cmd: Added.
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExportGeneratorPreBuild.cmd: Added.
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExportGeneratorRelease.props: Added.
* JavaScriptCore.vcxproj/JavaScriptCoreExportGenerator/JavaScriptCoreExports.def.in: Added.
* WebKit.vcxproj/WebKit.sln:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@141939 268f45cc-cd09-0410-ab3c-d52691b4dbfc