Patch civetweb to use <poll.h> rather than <sys/poll.h>.
Patch civetweb to use <poll.h> rather than <sys/poll.h>.

<sys/poll.h> was missing from pnacl, newlib in pepper_30
and pepper_31.  I've added it for 32, but this change
allows civetweb to build with 30 and 31.

Also, I think that including <poll.h> is more correct
anyway.

R=binji@chromium.org

Review URL: https://codereview.chromium.org/44883002

git-svn-id: 84b3587ce119b778414dcb50e18b7479aacf4f1d@936 7dad1e8b-422e-d2af-fbf5-8013b78bd812

yeyus/naclports,binji/naclports,Schibum/naclports,dtkav/naclports,clchiou/naclports,kuscsik/naclports,binji/naclports,clchiou/naclports,yeyus/naclports,binji/naclports,kosyak/naclports_samsung-smart-tv,kuscsik/naclports,binji/naclports,dtkav/naclports,kuscsik/naclports,clchiou/naclports,kuscsik/naclports,yeyus/naclports,adlr/naclports,kosyak/naclports_samsung-smart-tv,kosyak/naclports_samsung-smart-tv,kosyak/naclports_samsung-smart-tv,dtkav/naclports,yeyus/naclports,Schibum/naclports,clchiou/naclports,kuscsik/naclports,dtkav/naclports,yeyus/naclports,clchiou/naclports,kosyak/naclports_samsung-smart-tv,binji/naclports,Schibum/naclports,yeyus/naclports,adlr/naclports,Schibum/naclports,adlr/naclports,adlr/naclports,Schibum/naclports,dtkav/naclports,adlr/naclports,Schibum/naclports