bitbake: fetch2: Fix misleading "no output" msg

When a command is run with a non-null log, errors are only output to the
log and are not returned in the exception. In that case direct users to
that logfile instead of telling the command had no output.

(Bitbake rev: 944fe0a77932a5559e01ae6035c4bffa5185ea6a)

Signed-off-by: Viswanath Kraleti <quic_vkraleti@quicinc.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/__init__.py

@@ -943,7 +943,10 @@ def runfetchcmd(cmd, d, quiet=False, cleanup=None, log=None, workdir=None):
         elif e.stderr:
             output = "output:\n%s" % e.stderr
         else:
-            output = "no output"
+            if log:
+                output = "see logfile for output"
+            else:
+                output = "no output"
         error_message = "Fetch command %s failed with exit code %s, %s" % (e.command, e.exitcode, output)
     except bb.process.CmdError as e:
         error_message = "Fetch command %s could not be run:\n%s" % (e.command, e.msg)