itstool: add patch to fix segfault

Signed-off-by: Jürgen Buchmüller <pullmoll@t-online.de>

srcpkgs/itstool/patches/fix-segfault.patch

@@ -0,0 +1,15 @@
+Description: Be more careful about libxml2 memory management
+Author: Guido Trentalancia
+Origin: https://github.com/itstool/itstool/pull/18
+
+--- itstool.in	2018-11-08 19:11:00.000000000 +0100
++++ itstool.in	2019-05-13 11:02:18.619090267 +0200
+@@ -1053,7 +1053,7 @@
+         else:
+             ctxt.replaceEntities(1)
+         ctxt.parseDocument()
+-        trnode = ctxt.doc().getRootElement()
++        trnode = ctxt.doc().getRootElement().copyNode(1)
+         try:
+             self._check_errors()
+         except libxml2.parserError:

srcpkgs/itstool/template

@@ -1,7 +1,7 @@
 # Template file for 'itstool'
 pkgname=itstool
 version=2.0.6
-revision=1
+revision=2
 archs=noarch
 build_style=gnu-configure
 configure_args="PYTHON=/usr/bin/python3"