Update p5-Audio-Scan to 0.59.

Pkgsrc fixes:
* correct LICENSE, not perl's, but exactly gplv2.
* set GNU_CONFIGURE=yes for affect pkgsrc magick to intenal copy of libid3tag.
* buildlink with zlib, internal libid3tag require it.

Package Changes:
0.59    2010-02-08 15:30:00
        - MP4: Bug 15656, read channels and bits_per_sample for ALAC files.
        - APE: Bug 15324, read APEv2 tags that don't contain a header.
        - APE: Fixed reading of binary tag data.
        - APE: Support for reading special "Cover Art (Front)" tag.

(obache)