theora 1.0 / pkg-config

with 1.0 about to be release we should make sure that the pkg-config
files that are installed work. pkg-config does not know about
alpha/beta/rc. so the order is

0.9
1.0
1.0.0
1.0RC1
1.0beta4
1.0rc1
1.1

one can check that with

  pkg-config --exists "theora >= 1.0beta3" && echo exists

which will not be true if version is 1.0, and so all software that
required a beta version, i.e. gstreamer uses
  PKG_CHECK_MODULES(THEORA, theora >= 1.0alpha5)

will not work with theora 1.0

would be good to find a way to solve this so that we do not have to
care about it in the future.

j