Some work on the lowlevel sound support
- ALSA driver is now default on Linux (if present)
- SDL sound driver is now default if no platform-specific driver is available
  and the SDL gui is enabled
- soundlnx.cc: sendwavepacket() now exits with error if device is not opened
- soundmod.cc: exit beep loop if sendwavepacket() returns error


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11764 6c8e4198-a580-4521-a02f-c9ae86df1db9
Regenerated after sound module changes


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11765 6c8e4198-a580-4521-a02f-c9ae86df1db9