Fix test cases for libxml2 2.9.10

Since the error reporting has been slightly changed, we have to adapt
the two affected test cases.

Author: cmb69

ext/dom/tests/DOMDocument_loadXML_error1.phpt

@@ -21,6 +21,6 @@ domdocumentloadxml_test_method.php
 --EXPECTF--
 Warning: DOMDocument::load%r(XML){0,1}%r(): Opening and ending tag mismatch: title line 5 and book %s
 
-Warning: DOMDocument::load%r(XML){0,1}%r(): expected '>' %s
+Warning: DOMDocument::load%r(XML){0,1}%r(): %rexpected '>'|Opening and ending tag mismatch: book line 5 and books%r %s
 
-Warning: DOMDocument::load%r(XML){0,1}%r(): Premature end of data in tag books %s
+Warning: DOMDocument::load%r(XML){0,1}%r(): %rPremature end of data in tag books|EndTag: '<\/' not found in Entity, line: 13%r %s

ext/dom/tests/DOMDocument_load_error1.phpt

@@ -21,6 +21,6 @@ domdocumentload_test_method.php
 --EXPECTF--
 Warning: DOMDocument::load%r(XML){0,1}%r(): Opening and ending tag mismatch: title line 5 and book %s
 
-Warning: DOMDocument::load%r(XML){0,1}%r(): expected '>' %s
+Warning: DOMDocument::load%r(XML){0,1}%r(): %rexpected '>'|Opening and ending tag mismatch: book line 5 and books%r %s
 
-Warning: DOMDocument::load%r(XML){0,1}%r(): Premature end of data in tag books %s
+Warning: DOMDocument::load%r(XML){0,1}%r(): %rPremature end of data in tag books|EndTag: '<\/' not found%r %s