Log Message:
Update to 1.15:

1.15  Sat Sep 28 22:14:31 PDT 2013
    - Gracefully handle empty fields in pkg-config files.

1.14  Sun Feb  3 17:51:54 PDT 2013
    - Skip tests for pkg-config binary with the '--max-version' switch on
      OpenBSD 5.2, due to a bug in OpenBSD's implemenation of 'pkg-config'
    - Updated Makefile.PL to use a META_MERGE block with WriteMakefile(); this
      block is what MetaCPAN reads when generating page output