added wxDEPRECATED_BUT_USED_INTERNALLY macro and use it for the old wxLog::DoLog() overloads

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@46479 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/cppconst.tex

@@ -221,4 +221,6 @@ library \texttt{XXX} as a DLL; when a monolithic wxWidgets build is used only a
 single \texttt{WXMAKINGDLL} symbol is defined}
 \twocolitem{WXUSINGDLL}{defined when compiling code which uses wxWidgets as a
 DLL/shared library}
+\twocolitem{WXBUILDING}{defined when building wxWidgets itself, whether as a
+static or shared library}
 \end{twocollist}