Fixing security issues on OBS toolchain (important)

This OBS toolchain update fixes the following issues:

Package ‘build’:

• CVE-2010-4226: force use of bsdtar for VMs (bnc#665768)
• CVE-2017-14804: Improve file name check extractbuild (bsc#1069904)
• switch baselibs scheme for debuginfo packages from foo-debuginfo-32bit
  to foo-32bit-debuginfo (fate#323217)

Package ‘obs-service-source_validator’:

• CVE-2017-9274: Don’t use rpmbuild to extract sources, patches etc. from
  a spec (bnc#938556).
• Update to version 0.7
• use spec_query instead of output_versions using the specfile parser from
  the build package (boo#1059858)

Package ‘osc’:

• update to version 0.162.0
• add Recommends: ca-certificates to enable TLS verification without
  manually installing them. (bnc#1061500)