[XEND] Open xend-debug.log in append mode.

Signed-off-by: John Levon <john.levon@sun.com>

tools/python/xen/xend/server/SrvDaemon.py

@@ -106,12 +106,12 @@ class Daemon:
         os.close(2)
         if XEND_DEBUG:
             os.open('/dev/null', os.O_RDONLY)
-            os.open(XEND_DEBUG_LOG, os.O_WRONLY|os.O_CREAT)
+            os.open(XEND_DEBUG_LOG, os.O_WRONLY|os.O_CREAT|os.O_APPEND)
             os.dup(1)
         else:
             os.open('/dev/null', os.O_RDWR)
             os.dup(0)
-            os.open(XEND_DEBUG_LOG, os.O_WRONLY|os.O_CREAT)
+            os.open(XEND_DEBUG_LOG, os.O_WRONLY|os.O_CREAT|os.O_APPEND)
 
         
     def start(self, trace=0):