GetCaps.
Change OSS driver to report certified.
Change OSS driver to show message name rather than number in traces.

- made use of new dbghelp pure ELF symbol lookup

Fix the size of the request buffer.
Don't try converting the optional information from W to A.

IDirectSound implementation.
Added proper COM behavior for QueryInterface for IDirectSound and
IDirectSound8.
Fixed a bug in the dsound.h header file for IDirectSound8
CreateSoundBuffer and DuplicateSoundBuffer.
Added new tests for proper COM behavior and enables some commented out
code for tests that work on windows.  Added new tests for
IDirectSound8.

- fixed some bugs in SYMOPT_NO_PUBLICS and SYMOPT_PUBLICS_ONLY
  handling
- in stabs parsing, just drop any debug info for a module if stabs
  parsing fails (instead of assert()'ing)
- symbol lookup now allows lookup in pure ELF modules
- fixed some bugs in symbol enumeration