[perl-cairo] Rename DOAP file to appease Gitlab

[Torsten Schönfeld <tsch src gnome org>]

commit a4c8f7d7a745de6f2ea63299da22dbe694fb41d5
Author: Torsten Schönfeld <kaffeetisch gmx de>
Date:   Wed Sep 11 21:38:24 2019 +0200

    Rename DOAP file to appease Gitlab

 perl-Cairo.doap => perl-cairo.doap | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
---
diff --git a/perl-Cairo.doap b/perl-cairo.doap
similarity index 100%
rename from perl-Cairo.doap
rename to perl-cairo.doap