Use absolute filename in autoversion Jinja2 filter
Use absolute filename in autoversion Jinja2 filter

Otherwise the path of filename[1:] will be incorrect - for
example the relative path 'static/i/logo.png' will produce a
file not found in staging/prod. This worked in the
development environment only because the dev server runs
in the same directory as the 'static' directory.

garrettr/securedrop,garrettr/securedrop,heartsucker/securedrop,heartsucker/securedrop,garrettr/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,ehartsuyker/securedrop,conorsch/securedrop,garrettr/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,conorsch/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,conorsch/securedrop,conorsch/securedrop