[babl] fix check version

[Øyvind Kolås <ok src gnome org>]

commit d3b91d5fb059bafd56743775b1677a5ae185f6c0
Author: Félix Piédallu <felix piedallu me>
Date:   Thu Dec 14 15:52:57 2017 +0100

    fix check version

 build/archlinux/PKGBUILD |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/build/archlinux/PKGBUILD b/build/archlinux/PKGBUILD
index 2d5fc76..6e87dc6 100644
--- a/build/archlinux/PKGBUILD
+++ b/build/archlinux/PKGBUILD
@@ -37,6 +37,6 @@ package() {
 }
 
 pkgver() {
-    cd "${srcdir}/${_gitname}"
+    cd "${_gitname}"
     git describe --always | sed -e 's/BABL_//g' -e 's/[_-]/./g'
 }