message: add pkg-config to build images for v8
diff: @@ -25,6 +25,7 @@ debs:
  - iptables # partition test infra
  - libclang1-9 # required by doxygen
  - libclang-cpp9 # required by doxygen
  + - pkg-config # required by v8
  # Not installed on GitHub Actions environment because of conflicting package
  docker_debs:
  