Test if zlib is present before giving dpdk's -lz linked PMD

10 jobs for master in 14 minutes and 44 seconds (queued for 16 seconds)
Status Job ID Name Coverage
  Test
passed #2928
batch

00:01:58

passed #2922
dpdk-batch

00:02:22

passed #2923
dpdk-nobatch

00:02:20

passed #2920
ip6

00:03:40

passed #2921
mt

00:02:41

passed #2925
netmap

00:02:15

passed #2926
netmap_nopool

00:02:51

passed #2927
netmap_nopool_nozc

00:02:13

passed #2924
netmap_single

00:01:52

failed #2919
batch

00:03:19