package/gutenprint: Un-deprecate and bump version to 5.2.11

Signed-off-by: Olivier Schonken <olivier.schonken@gmail.com>
[Thomas: add missing dependency of host-gutenprint on host-pkgconf,
needed since configure.ac uses PKG_CHECK_MODULES and the package is
autoreconfigured.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>