[libxml2]Add libxml2 library

libxml2/test/automata/abba

@@ -0,0 +1,30 @@
+#
+# Tests ab*a with an eliminated epsilon transition
+#
+t 0 1 a
+t 1 2 b
+e 1 2
+t 2 2 b
+t 2 3 a
+f 3
+-------
+a
+a
+=>
+# Pass
+a
+b
+b
+a
+=>
+# Pass
+a
+b
+=>
+# Fail
+a
+b
+a
+b
+=>
+# Fail