Allow passing wxLongLong values directly to wx pseudo-vararg functions.

Allow passing wxLongLong values directly to wx pseudo-vararg functions.

Allow passing wxLongLong objects when a "%lld" format specifier (or
equivalent) is used just as we already do for wxString objects when "%s" is
used. This is more convenient and makes wxLongLong closes to the native type.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67760 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775