[WinCairo] Build the WebKit.dll under VS2010.
https://bugs.webkit.org/show_bug.cgi?id=112759

Reviewed by Tim Horton.

* WebKit.vcxproj/Interfaces/Interfaces.vcxproj: Update project to
build WinCairo variant using new property sheets.
* WebKit.vcxproj/Interfaces/InterfacesDebugWinCairo.props: Added.
* WebKit.vcxproj/Interfaces/InterfacesReleaseWinCairo.props: Added.
* WebKit.vcxproj/WebKit.sln: Update solution to use WinCairo
build targets for WebKit.dll-related projects.
* WebKit.vcxproj/WebKit/WebKit.vcxproj: Update project to build
WinCairo variant using new property sheets.
* WebKit.vcxproj/WebKit/cURL.props: Added.
* WebKit.vcxproj/WebKit/WebKitDebugWinCairo.props: Added.
* WebKit.vcxproj/WebKit/WebKitReleaseWinCairo.props: Added.
* WebKit.vcxproj/WebKitExportGenerator/WebKitExportGenerator.vcxproj:
Update project to build WinCairo variant using new property sheets.
* WebKit.vcxproj/WebKitExportGenerator/WebKitExportGeneratorDebugWinCairo.props: Added.
* WebKit.vcxproj/WebKitExportGenerator/WebKitExportGeneratorReleaseWinCairo.props: Added.
* WebKit.vcxproj/WebKitGUID/WebKitGUID.vcxproj: Update project to
build WinCairo variant using new property sheets.
* WebKit.vcxproj/WebKitGUID/WebKitGUIDDebugWinCairo.props: Added.
* WebKit.vcxproj/WebKitGUID/WebKitGUIDReleaseWinCairo.props: Added.
* WebKit.vcxproj/WinCairo.props: Added.
* WebKit.vcxproj/debug_wincairo.props: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146381 268f45cc-cd09-0410-ab3c-d52691b4dbfc