bitbake fetch/__init__.py: Failing urls should raise errors, not fatal exceptions

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

bitbake/lib/bb/fetch/__init__.py

@@ -232,7 +232,7 @@ def checkstatus(d):
                 ret = try_mirrors (d, u, mirrors, True)
 
         if not ret:
-            bb.msg.fatal(bb.msg.domain.Fetcher, "URL %s doesn't work" % u)
+            bb.msg.error(bb.msg.domain.Fetcher, "URL %s doesn't work" % u)
 
 def localpaths(d):
     """