Updated xpce
Revert "FIXED: Compilation of terms expanded to '$source_location':Clause in"

This reverts commit 92bd3a4f6abd455e8b260fae37e03f2f71297903.
FIXED: Terms expanded to '$source_location'(_,_):Clause should consider the case
       when Clause is further expanded to a list.  The predicate expand_terms/5
       in expand.pl was modified to handle such situation correctly.
FIXED: Allows tagging directives with a source location.  Patch by Edison
Mera.