rules: increase test timeout (Closes: #918316).

Thanks, Santiago Vila.
7 jobs for master in 1 minute and 43 seconds (queued for 57 seconds)
latest
Status Job ID Name Coverage
  Check
passed #102854
cme
dpkg-control

00:00:07

passed #102855
cme
dpkg-copyright

00:00:04

passed #102856
yamllint
yamllint

00:00:04

 
  Build
passed #102860
amd64 pbuilder
stretch-amd64

00:00:39

passed #102857
amd64 pbuilder
testing_unstable-amd64

00:00:47

passed #102859
amd64 pbuilder
unstable-amd64

00:00:44

passed #102858
amd64 pbuilder
unstable-i386

00:00:45