added a newline for any comment before the root element (Bug 130433) fixed

added a newline for any comment before the root element (Bug 130433) fixed

* libxslt/xsltutils.c: added a newline for any comment before
  the root element (Bug 130433)
* libxslt/xslt.c: fixed problem with cdata-section-elements when
  default namespace is changed (Bug 130793)
* tests/extensions/module.out, tests/general/bug-100.out: adjusted
  for newline after comment change above.
* tests/general/Makefile.am, tests/general/bug-140.xsl,
  tests/general/Makefile.am, tests/docs/bug-140.xml: added test for
  cdata-section-elements problem.