scripts/pkgdep: add unzip package to sles

unzip is missing by default from sles

tested using:
```
    ./scripts/pkgdep.sh --all
    ./configure --enable-coverage
    source ./scripts/common.sh
    make -j
```

and those images:
  - docker.io/opensuse/leap:15.6
  - docker.io/opensuse/leap:16.0

Change-Id: I51a081d3a3f3d717422b7d249ad03dc18132312f
Signed-off-by: Boris Glimcher <Boris.Glimcher@emc.com>
Reviewed-on: https://review.spdk.io/c/spdk/spdk/+/26607


Reviewed-by: Michal Berger <michal.berger@nutanix.com>
Reviewed-by: Tomasz Zawadzki <tomasz@tzawadzki.com>
Reviewed-by: Karol Latecki <karol.latecki@nutanix.com>
Reviewed-by: Jim Harris <jim.harris@nvidia.com>
Tested-by: SPDK Automated Test System <spdkbot@gmail.com>
Community-CI: Mellanox Build Bot