tryton should use sys.prefix

Instead of guessing the installation prefix, tryton should use sys.prefix

added type::crash + 1 deleted label

See http://www.tryton.org/~irclog/2013-11-21.log.html#t2013-11-21%2018:24

added 1 deleted label and removed 1 deleted label

Please test patch at review2881002

assigned to @ced

added tryton + 1 deleted label and removed 1 deleted label

New changeset 791ba72420ef by C?dric Krier in branch 'default':
Use sys.prefix instead of guessing
http://hg.tryton.org/tryton/rev/791ba72420ef

added 1 deleted label and removed 1 deleted label

closed

mentioned in commit 977a6995a0e2