test-meta.sh: don't test for bup.1
test-meta.sh: don't test for bup.1

The manpages may not exist (i.e. if pandoc's not available).

Thanks to Mark J Hewitt for reporting the issue.

Signed-off-by: Rob Browning <1dc5917c2adeeba13d1ef33dbb40691a1b67cc65@defaultvalue.org>
Tested-by: Rob Browning <1dc5917c2adeeba13d1ef33dbb40691a1b67cc65@defaultvalue.org>

gevaerts/bup,pombredanne/bup,gevaerts/bup,pombredanne/bup,ToxicFrog/bup,jbaber/bup,mhoeher/bup,jbaber/bup,mhoeher/bup,gevaerts/bup,tjanez/bup,jbaber/bup,pombredanne/bup,mhoeher/bup,ToxicFrog/bup,jbaber/bup,tjanez/bup,ToxicFrog/bup,tjanez/bup,pombredanne/bup,gevaerts/bup,tjanez/bup,mhoeher/bup,jbaber/bup,jbaber/bup,tjanez/bup,ToxicFrog/bup,mhoeher/bup,mhoeher/bup,ToxicFrog/bup,tjanez/bup,gevaerts/bup,pombredanne/bup,pombredanne/bup