... which are specified by full filepath, by making the de-duplication
consistent with that applied to libs specified with -l, that is, last
one wins.
the problem existed "forever", but it became more visible after the
recent configure changes.
fwiw, Win32MakefileGenerator is not affected, because it has the
opposite problem: it de-duplicates everything (including object files)
in "last one wins mode". it might make sense to change that as well.
Change-Id: Id7ef1d394fcc9d444450672c06a6f11af2b19eab
Reviewed-by: Robert Griebl <robert.griebl@pelagicore.com>