These functions are needed due Android NDK lacking wide character support,
as wchar_t == char according to Android NDK bionic libc/include/wchar.h
WARNING: They are minimally functional (provided provisorily until proper
workaround is found, specially maybe using Qt built-in functionality).
"Basically they produce complete garbage with non-ASCII characters"
For more info see discussion in wx-dev list:
https://groups.google.com/d/msg/wx-dev/71qtIFcujgM/Q-lbwl59vOIJ
Thanks @seandepagnier (modified a bit the comments, added #warning and
restructured #if blocks to be only specific for __ANDROID__)
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78473 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775