Hopefully, I've applied all of the $(LTLIBINTL) changes correctly...

Some plugins may have been missed due to them not being built here.

Move the definition of it to a much more appropriate location.

-- Removed m4/optimizations.m4, and along with it, AC_OPTIMIZATIONS.
-- Stripped down, cleaned up, and merged the former together with other compiler
   characteristic checks.
-- Do not set any optimization flags into CFLAGS.  Update all Makefile.am's with
   proper AM_CFLAGS, AM_CPPFLAGS, AM_LDFLAGS, etc. to set up optimization flags,
   usually from DEFAULT_OCFLAGS.
-- Start cleaning up CFLAGS/CPPFLAGS stuff in Makefile.am's all over the place.
-- Correct a number of places where CFLAGS itself was being mangled in
   Makefile to on-the-fly adjust optimizations to work around compiler bugs.
   This stuff is now done correctly.
-- The run of automake from autogen.sh is now clean of warnings.
-- Cleaned out some (now) dead macros from m4/_xine.m4
-- Mac OS X intel builds out-of-the-box now -- dropped optimization on
   post/deinterlace/plugins/kdetv-greedyh to O1_CFLAGS.
-- OBJCFLAGS is now getting set correctly everywhere that it needs to be
-- Various other miscellaneous cleanups all over

as needed for some files where gcc runs out of registers otherwise.

Together with this, define a xinepost_LTLIBRARIES class that is used
to install the post-plugins in the correct directory.

Also add the rule to remove them.