bitbake: process: Flush key output to logs

Small tweak to ensure these items are printed into the log since there
is other logging code which looks for the header and this makes it clearer
the server did start but is slow somewhere in startup.

(Bitbake rev: 9b15f265643af8bd85af87164ee5cab0bf58ccbb)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/server/process.py

@@ -433,6 +433,8 @@ class BitBakeServer(object):
 
     def _startServer(self):
         print(self.start_log_format % (os.getpid(), datetime.datetime.now().strftime(self.start_log_datetime_format)))
+        sys.stdout.flush()
+
         server = ProcessServer(self.bitbake_lock, self.sock, self.sockname)
         self.configuration.setServerRegIdleCallback(server.register_idle_function)
         os.close(self.readypipe)
@@ -444,6 +446,8 @@ class BitBakeServer(object):
         server.server_timeout = self.configuration.server_timeout
         server.xmlrpcinterface = self.configuration.xmlrpcinterface
         print("Started bitbake server pid %d" % os.getpid())
+        sys.stdout.flush()
+
         server.start()
 
 def connectProcessServer(sockname, featureset):