ansible: install glib2-devel on centos7-ppc64

V8 CI needs `glib2-devel` installed.

Author: richardlau

ansible/roles/baselayout/vars/main.yml

@@ -42,7 +42,7 @@ packages: {
   # partials/repo/centos7.yml for arm64
   centos7_arm64: ['git,python3'], # git2u not available for aarch64 (yet)
   centos7_x64: ['devtoolset-6-libatomic-devel,git222,centos-release-scl,python3'],
-  centos7_ppc64: ['cmake3,devtoolset-6-libatomic-devel,git,python3'],
+  centos7_ppc64: ['cmake3,devtoolset-6-libatomic-devel,glib2-devel,git,python3'],
 
   centos7: [
     'bzip2-devel,openssl-devel,ccache,gcc-c++,devtoolset-6,sudo,zlib-devel,libffi-devel,devtoolset-8,devtoolset-8-libatomic-devel',