Original commit message from CVS:
* win32/common/libgstaudio.def:
Add new exported functions.
* win32/vs6/grammar.dsp:
Add autogeneration and copy of some autegenerated files from win32/common
for rtsp library.
* win32/vs6/libgstaudioconvert.dsp:
Add gstaudioquantize.c to the build.
* win32/vs6/libgstinterfaces.dsp:
Add videoorientation.c to the build.
* win32/vs6/libgstriff.dsp:
Add libgsttag to the link libraries list.
* win32/vs6/libgstvolume.dsp:
Add liboil to the link.
* win32/vs6/gst_plugins_base.dsw:
* win32/vs6/libgstrtsp.dsp:
* win32/common/libgstrtsp.def:
Add files to build libgstrtsp library.
