bitbake: bitbake: Set process names to be meaninful

This means that when you view the process tree, the processes
have meaningful names, aiding debugging:

$ pstree -p 30021
bash(30021)───KnottyUI(115579)───Cooker(115590)─┬─PRServ(115592)───{PRServ Handler}(115593)
                                                ├─Worker(115630)───bash:sleep(115631)───run.do_sleep.11(115633)───sleep(115634)
                                                └─{ProcessEQueue}(115591)

$ pstree -p 30021
bash(30021)───KnottyUI(117319)───Cooker(117330)─┬─Cooker(117335)
                                                ├─PRServ(117332)───{PRServ Handler}(117333)
                                                ├─Parser-1:2(117336)
                                                └─{ProcessEQueue}(117331)

Applies to parse threads, PR Server, cooker, the workers and execution
threads, working within the 16 character limit as best we can.

Needed to tweak the bitbake-worker magic values to tell the
workers apart.

(Bitbake rev: 539726a3b2202249a3f148d99e08909cb61902a5)

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

bitbake/lib/prserv/serv.py

@@ -79,6 +79,8 @@ class PRServer(SimpleXMLRPCServer):
         # 60 iterations between syncs or sync if dirty every ~30 seconds
         iterations_between_sync = 60
 
+        bb.utils.set_process_name("PRServ Handler")
+
         while not self.quit:
             try:
                 (request, client_address) = self.requestqueue.get(True, 30)
@@ -141,6 +143,8 @@ class PRServer(SimpleXMLRPCServer):
         self.quit = False
         self.timeout = 0.5
 
+        bb.utils.set_process_name("PRServ")
+
         logger.info("Started PRServer with DBfile: %s, IP: %s, PORT: %s, PID: %s" %
                      (self.dbfile, self.host, self.port, str(os.getpid())))