Fix wkhtmltopdf-0.12.2 broken url

The image now uses a local copy on our server of the release 0.12.2.1
of wkhtmltopdf to prevent further problems of broken url due to
updates.

library/odoo

@@ -1,5 +1,5 @@
 # maintainer: Aaron Bohy <[email protected]> (@aab-odoo)
 
-8.0: git://github.com/odoo/docker@3a6e42c7a7698196dd42dc7c4b5782ab50885f89 8.0
-8: git://github.com/odoo/docker@3a6e42c7a7698196dd42dc7c4b5782ab50885f89 8.0
-latest: git://github.com/odoo/docker@3a6e42c7a7698196dd42dc7c4b5782ab50885f89 8.0
+8.0: git://github.com/odoo/docker@a86b7e6dbc31d19b6180fdf00e56b4a0f5fe32ff 8.0
+8: git://github.com/odoo/docker@a86b7e6dbc31d19b6180fdf00e56b4a0f5fe32ff 8.0
+latest: git://github.com/odoo/docker@a86b7e6dbc31d19b6180fdf00e56b4a0f5fe32ff 8.0