configure.ac: Bump core/base requirements to released versions, to avoid confusion.

configure.ac: Bump core/base requirements to released versions, to avoid confusion.

Original commit message from CVS:
* configure.ac:
Bump core/base requirements to released versions, to avoid confusion.
* gst/deinterlace/Makefile.am:
* gst/deinterlace/gstdeinterlace.c: (gst_deinterlace_set_caps):
Use the new GstVideoFormat API to get strides, plane offsets etc..
For Y42B we still need to calculate these ourselves, since the lib
in -base doesn't know about this format yet and we can't bump the
requirement to CVS right now. Fix the Y42B stride, offset and size
calculations for odd widths and heights while we're at it though
(to match those in videotestsrc).