buildah: Buildah RPM spec missing Requires for ostree

The buildah RPM spec used to build RPM in CentOS extras is missing the Requires for the ostree package which provides libostree-1.so.1.

Description

After installing buildah RPM for CentOS extras buildah fails to run, producing the following error:

buildah: error while loading shared libraries: libostree-1.so.1: cannot open shared object file: No such file or directory

Steps to reproduce the issue:

1. Add required repos to yum configuration
2. yum install buildah
3. execute buildah

Describe the results you received: buildah: error while loading shared libraries: libostree-1.so.1: cannot open shared object file: No such file or directory

Describe the results you expected: All libraries required for buildah to be defined in RPM and installed in yum install step.

Output of rpm -q buildah or apt list buildah:

buildah-0.9-1.git04ea079.el7.x86_64

Output of buildah -v:

buildah version 0.9 (image-spec 1.0.0, runtime-spec 1.0.0)

Workaround: Manually install ostree package to resolve missing library/dependency issue

1. yum install ostree