Updated libxml2 to 2.9.9

Makefile

 all:
-	tar xf libxml2-2.9.8.tar.gz
-	patch -Np1 -d libxml2-2.9.8 < libxml2-2.9.8-python3_hack-1.patch
-	cd libxml2-2.9.8 && sed -i '/_PyVerify_fd/,+1d' python/types.c
-	cd libxml2-2.9.8 && ./configure --build=$(CLFS_TARGET) --prefix=/usr --disable-static --with-history --with-python=/usr/bin/python3 --with-threads
-	$(MAKE) -C libxml2-2.9.8
-	cd libxml2-2.9.8 && tar xf ../xmlts20130923.tar.gz
+	tar xf libxml2-2.9.9.tar.gz
+	cd libxml2-2.9.9 && sed -i '/_PyVerify_fd/,+1d' python/types.c
+	cd libxml2-2.9.9 && ./configure --build=$(CLFS_TARGET) --prefix=/usr --disable-static --with-history --with-python=/usr/bin/python3 --with-threads
+	$(MAKE) -C libxml2-2.9.9
+	cd libxml2-2.9.9 && tar xf ../xmlts20130923.tar.gz
 	if [[ ! "$(BUILD_OPTIONS)" =~ no-tests ]] ; then \
-	    $(MAKE) -C libxml2-2.9.8 check ; \
+	    $(MAKE) -C libxml2-2.9.9 check ; \
 	    rm /missing.xml ; \
 	fi
-	$(MAKE) -C libxml2-2.9.8 install
-	rm -rf libxml2-2.9.8
+	$(MAKE) -C libxml2-2.9.9 install
+	rm -rf libxml2-2.9.9

libxml2-2.9.8-python3_hack-1.patch

-diff -uNr libxml2-2.9.8/python/libxml.c libxml2-2.9.8-python3_hack-1/python/libxml.c
---- libxml2-2.9.8/python/libxml.c	2016-06-07 19:34:14.000000000 +0930
-+++ libxml2-2.9.8-python3_hack-1/python/libxml.c	2018-06-17 23:18:38.255187110 +0930
-@@ -1620,6 +1620,7 @@
-     PyObject *message;
-     PyObject *result;
-     char str[1000];
-+    unsigned char *ptr = (unsigned char *)str;
- 
- #ifdef DEBUG_ERROR
-     printf("libxml_xmlErrorFuncHandler(%p, %s, ...) called\n", ctx, msg);
-@@ -1636,12 +1637,20 @@
- 	    str[999] = 0;
-         va_end(ap);
- 
-+#if PY_MAJOR_VERSION >= 3
-+        /* Ensure the error string doesn't start at UTF8 continuation. */
-+        while (*ptr && (*ptr & 0xc0) == 0x80)
-+            ptr++;
-+#endif
-+
-         list = PyTuple_New(2);
-         PyTuple_SetItem(list, 0, libxml_xmlPythonErrorFuncCtxt);
-         Py_XINCREF(libxml_xmlPythonErrorFuncCtxt);
--        message = libxml_charPtrConstWrap(str);
-+        message = libxml_charPtrConstWrap(ptr);
-         PyTuple_SetItem(list, 1, message);
-         result = PyEval_CallObject(libxml_xmlPythonErrorFuncHandler, list);
-+        /* Forget any errors caused in the error handler. */
-+        PyErr_Clear();
-         Py_XDECREF(list);
-         Py_XDECREF(result);
-     }