Revise Debug_Cairo build target to build testapi, jsc, WinLauncher,
DumpRenderTree, and TestNetscapeAPI using WinCairo debug build
settings so they link against the proper libraries.

* WebKit.vcproj/WebKit.sln:

WebKitTools: Build fix

Revise Debug_Cairo targets to point inherit from the 
debug_wincairo.vsprops property sheet so that they link
against the proper libraries in Debug build.

* DumpRenderTree/win/DumpRenderTree.vcproj:
* DumpRenderTree/win/TestNetscapePlugin/TestNetscapePlugin.vcproj:
* WinLauncher/WinLauncher.vcproj:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@47762 268f45cc-cd09-0410-ab3c-d52691b4dbfc