[PATCH xserver] tests: Avoid libtool message

[Mihail Konev]

On Thu, Jan 12, 2017 at 01:36:56PM -0500, Adam Jackson wrote:
> On Tue, 2017-01-03 at 23:40 +0500, Mihail Konev wrote:
> > The "copying selected object files" message appears as some source
> > files have the same name, and some objects are included twice.
> 
> remote: E: failed to find patch for rev 45546219e117c1b6129fd9f9be2ce5b592486feb.
> remote: I: 0 patch(es) updated to state Accepted.
> To ssh://git.freedesktop.org/git/xorg/xserver
>    785053d..4554621  master -> master
> 
> - ajx

v4 6/6 (remove libxservertest.la) makes this unnecessary.
So must have been doing v1 10/10.