pcr: drm_info: rebuild against new libjson
Without that fix, on i686 we have:
$ drm_info
drm_info: error while loading shared libraries: libjson-c.so.4:
cannot open shared object file: No such file or directory
Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>