Add libvpx submodule that tracks the upstream version 1.3.0. This is
needed to build a libgstcodecparsers_vpx.so library with all symbols
placed into the GSTREAMER namespace.
If gtkdocize or autoreconf programs were not found, then the autogen.sh
script would fail to report that correctly because test -z was not passed
any argument (empty string "" in this case).
This patch allows for regenerating the configure script from a build
directory that is not the actual source directory.
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Also do not generate tamplate files as all the documentation is inline.
Drop un-needed code in autogen.sh as well.
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
