Log Message:
p5-Alien-Build: update to 1.48.

1.48      2018-07-04 20:33:29 -0400

1.47_01   2018-07-03 23:17:09 -0400
  - Fixed bug where Alien::Base was capturing stderr and stdout
    from pkg-config, instead of just stdout which is what it should
    be doing.
  - Additional diagnostics for xz fail

1.46      2018-06-25 03:08:25 +0000
  - Production release identical to 1.45_01

1.45_01   2018-06-24 08:13:08 -0400
  - Add alt method to Alien::Base.  This merges the capabilities from
    Alien::Role::Alt into core, making that role now obsolete.
  - Add alt_names and alt_exists methods to Alien::Base.  This was a
    capability missing from Alien::Role::Alt
  - Fix bug in Alien::Build::MM where 'make alien_prop_runtime' printed
    install instead of runtime properties

1.44_01   2018-06-20 06:36:57 -0600
  - Added Alien::Build::Plugin::Prefer::GoodVersion