Blocked revisions 412480

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channels/chan_oss: Fix compilation problem on SmartOS/Illumos/SunOS

THis patch fixes an issue in chan_oss when building on certain platforms. It
ensures that soundcard.h is found.

Review: https://reviewboard.asterisk.org/r/3426

Note that this patch is a part of the patch on ASTERISK-23576; the Makefile
portion only applies to Asterisk 11+.

(issue ASTERISK-23576)
Reported by: Sebastian Wiedenroth
patches:
  fix-sunos.diff uploaded by Sebastian Wiedenroth (License 6597)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@412482 65c4cc65-6c06-0410-ace0-fbb531ad65f3