bitbake: process: Increase server startup timeout

We're seeing the server fail to start within 8s on heavily loaded
autobuilders so increase this timeout to 30s which should be more
than enough time.

(Bitbake rev: 8d4c120ec46d6d7a54947c64d33e18cb60b60505)

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

bitbake/lib/bb/server/process.py

@@ -388,7 +388,7 @@ class BitBakeServer(object):
         self.bitbake_lock.close()
 
         ready = ConnectionReader(self.readypipe)
-        r = ready.wait(8)
+        r = ready.wait(30)
         if not r:
             ready.close()
             bb.error("Unable to start bitbake server")