expat: add security patch for CVE-2009-3560

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/expat/expat-2.0.1-CVE-2009-3560.patch

@@ -0,0 +1,14 @@
+http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3560
+
+--- a/lib/xmlparse.c
++++ b/lib/xmlparse.c
+@@ -3703,6 +3703,9 @@ doProlog(XML_Parser parser,
+         return XML_ERROR_UNCLOSED_TOKEN;
+       case XML_TOK_PARTIAL_CHAR:
+         return XML_ERROR_PARTIAL_CHAR;
++      case -XML_TOK_PROLOG_S:
++        tok = -tok;
++        break;
+       case XML_TOK_NONE:
+ #ifdef XML_DTD
+         /* for internal PE NOT referenced between declarations */