Log Message:
Update audio/libmodplug to 0.8.8.4.

Upstream changes:

    * Improve timidity.cfg parsing capability
    * Add source command capability in timidity.cfg (useful for debian default)
    * Fix integer overflow in WAV reader (SA45131/A)
    * Fix S3M stack overflow possibility (SA45131/B)
    * Bound seeking and reading in PAT files
    * Fix AMS/AMSv2 and DSM too large by one (SA45131/C)
    * Use structure in XM decoding (development related)
    * Use bmpvalues in Octamed files when calcuting default tempo (Francis Russel)

Fixes SA45131.