K 10
svn:author
V 6
marino
K 8
svn:date
V 27
2016-04-06T15:29:26.482038Z
K 7
svn:log
V 312
audio/mac: Don't clobber BUILD_DEPENDS + DF support

The yasm BUILD_DEPENDS will overwrite any previous definition
of BUILD_DEPENDS (e.g. iconv).  Change the operator to += to fix.
While here, yasm is only valid for FreeBSD, so add an OPSYS condition
in addition to the ARCH condition.

Approved by:	just-fix-it

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