xl list -l should produce readable output when built with yajl2 so
it is compatible with the xendomains script.

Signed-off-by: Michael Young <m.a.young@durham.ac.uk>

--- xen-4.2.2/tools/libxl/libxl_json.h.orig	2013-03-21 17:55:42.000000000 +0000
+++ xen-4.2.2/tools/libxl/libxl_json.h	2013-04-10 22:14:15.938459238 +0100
@@ -54,7 +54,11 @@
 
 static inline yajl_gen libxl_yajl_gen_alloc(const yajl_alloc_funcs *allocFuncs)
 {
-    return yajl_gen_alloc(allocFuncs);
+    yajl_gen g;
+    g = yajl_gen_alloc(allocFuncs);
+    if (g)
+        yajl_gen_config(g, yajl_gen_beautify, 1);
+    return g;
 }
 
 #else /* !HAVE_YAJL_V2 */