Renamed the CURLX_ONES file list definition in order to a) try and be
consistent with other file lists and b) to allow for the addition of
the curlx header files, which will assist with Visual Studio project
files generation rather than hard coding those files.
This is untested, but ought to be enough to still allow it
to work automatically when the entire curl source tree is
dropped into a full Android source tree.
Daniel Stenberg