fixes a libtool problem on AMD 64bits builds found the validation problem

* libxml.spec.in: fixes a libtool problem on AMD 64bits builds
* relaxng.c: found the validation problem I had with interleave
  when not covering all remaining siblings
* Makefile.am test.relaxng/* result/relaxng/*: augmented the
  testsuite and check the RNG schemas against the RNG schemas
  given in appendix A
Daniel
180 files changed