add Id keyword; remove old code (was commented out) which tried to implement alternat...

add Id keyword; remove old code (was commented out) which tried to implement alternative parsing strategies; basically those involved doing 4-5 passes on the gcc XML before actually passing it storing the list of the type IDs related in some way to wxWidgets, and then do the true parsing pass, skipping anything non-wx related. This approach (and its variations) showed however to be slower than building the full type table.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52710 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775