f38c05104 [depends] Don't build libevent sample code (fanquake)
Pull request description:
Noticed today while doing Windows depends builds.
Before and after libevent build on OS X.
```
Building libevent...
GEN include/event2/event-config.h
/Applications/Xcode.app/Contents/Developer/usr/bin/make all-am
CC buffer.lo
CC bufferevent.lo
CC bufferevent_filter.lo
CC bufferevent_ratelim.lo
CC bufferevent_sock.lo
CC bufferevent_pair.lo
CC event.lo
CC evmap.lo
CC evthread.lo
CC evutil.lo
CC evutil_rand.lo
CC evutil_time.lo
CC listener.lo
CC log.lo
CC select.lo
CC poll.lo
CC kqueue.lo
CC signal.lo
CC evdns.lo
CC event_tagging.lo
CC evrpc.lo
CC http.lo
CC evthread_pthread.lo
CC sample/dns-example.o
CC sample/event-read-fifo.o
CC sample/hello-world.o
CC sample/http-server.o
CC sample/http-connect.o
CC sample/signal-test.o
CC sample/time-test.o
CCLD libevent_core.la
CCLD libevent_pthreads.la
CCLD libevent.la
CCLD libevent_extra.la
CCLD sample/event-read-fifo
CCLD sample/dns-example
CCLD sample/hello-world
CCLD sample/http-server
CCLD sample/http-connect
CCLD sample/signal-test
CCLD sample/time-test
Staging libevent...
```
```
Building libevent...
GEN include/event2/event-config.h
/Applications/Xcode.app/Contents/Developer/usr/bin/make all-am
CC buffer.lo
CC bufferevent.lo
CC bufferevent_filter.lo
CC bufferevent_pair.lo
CC bufferevent_ratelim.lo
CC bufferevent_sock.lo
CC event.lo
CC evmap.lo
CC evthread.lo
CC evutil.lo
CC evutil_rand.lo
CC evutil_time.lo
CC listener.lo
CC log.lo
CC select.lo
CC poll.lo
CC kqueue.lo
CC signal.lo
CC evdns.lo
CC event_tagging.lo
CC evrpc.lo
CC http.lo
CC evthread_pthread.lo
CCLD libevent_core.la
CCLD libevent_pthreads.la
CCLD libevent.la
CCLD libevent_extra.la
Staging libevent...
```
Tree-SHA512: a82bde38e110a16f934c0f1e95d3ae66662c1b3c1367e4a6e7c4994f585ebeea4f5cbee4d98a8dc64a8e8936eb9f4bb0c55fb65e718f724d88e81cb8fa84be88
