adding web view files for building Xcode projects, see #15590

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75037 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
adding web view files for building Xcode projects, fixes #15590

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75038 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775