slight tweak to test run instructions

...
ERROR (src/unixy.c:165: errno: No such file or directory) Failed to open PID file ./run/mongrel2.pid for writing.
ERROR (src/mongrel2.c:163: errno: Unknown error: 0) Failed to make the PID file ./run/mongrel2.pid
ERROR (src/mongrel2.c:280: errno: Unknown error: 0) Major failure in chroot/droppriv, aborting.
ERROR (src/mongrel2.c:305: errno: Unknown error: 0) Exiting due to error.

src/mongrel2 > mkdir logs run tmp

src/mongrel2 > mongrel2 tests/config.sqlite localhost
...
ERROR (src/mongrel2.c:156: errno: Unknown error: 0) Couldn't chroot too ./, assuming running in test mode.
INFO (src/server.c:106) Starting 0MQ with 2 threads.
INFO (src/server.c:136) Starting server on port 6767
DEBUG src/server.c:120: LOADING BACKEND @chat
DEBUG src/server.c:120: LOADING BACKEND /handlertest
INFO (src/task/fd.c:40) maximum number of file descriptors is 256

INFO (src/handler.c:249) Binding handler PUB socket tcp://127.0.0.1:9999 with identity: 54c6755b-9628-40a4-9a2d-cc82a816345e
INFO (src/handler.c:271) Binding listener SUB socket tcp://127.0.0.1:9998 subscribed to: 
INFO (src/handler.c:249) Binding handler PUB socket tcp://127.0.0.1:9997 with identity: 54c6755b-9628-40a4-9a2d-cc82a816345e
INFO (src/handler.c:271) Binding listener SUB socket tcp://127.0.0.1:9996 subscribed to: