Set svn properties on new files.

In the majority of cases set the svn:eol-style property (mostly to native for sources and LF for m4 files) and svn:keywords to Id. Applied for files that were added since r72503.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74498 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775