Regenerated API and symbols

* doc/Makefile.am: make the check for symbols pbm a make api failure
* doc/symbols.xml: added xmlXIncludeProcessTreeFlagsData
* doc//* elfgcchack.h libxml2.syms testapi.c: regenerated
diff --git a/doc/APIchunk27.html b/doc/APIchunk27.html
index f667b49..e04260d 100644
--- a/doc/APIchunk27.html
+++ b/doc/APIchunk27.html
@@ -127,6 +127,7 @@
 <a href="html/libxml-xinclude.html#xmlXIncludeProcessNode">xmlXIncludeProcessNode</a><br />
 <a href="html/libxml-xinclude.html#xmlXIncludeProcessTree">xmlXIncludeProcessTree</a><br />
 <a href="html/libxml-xinclude.html#xmlXIncludeProcessTreeFlags">xmlXIncludeProcessTreeFlags</a><br />
+<a href="html/libxml-xinclude.html#xmlXIncludeProcessTreeFlagsData">xmlXIncludeProcessTreeFlagsData</a><br />
 </dd><dt>wether</dt><dd><a href="html/libxml-xpath.html#_xmlNodeSet">_xmlNodeSet</a><br />
 </dd><dt>what</dt><dd><a href="html/libxml-catalog.html#xmlCatalogGetDefaults">xmlCatalogGetDefaults</a><br />
 <a href="html/libxml-catalog.html#xmlCatalogSetDefaults">xmlCatalogSetDefaults</a><br />