test: silence some Clang warnings

They only show up on OSX for some reason, though.

PR-URL: https://github.com/libuv/libuv/pull/67
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
test: relax osx_select_many_fds

1502 is not enough, since there are other fds which are in use
internally.

PR-URL: https://github.com/libuv/libuv/pull/67
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
test: fix compilation warnings when building with Clang

warning: ISO C90 forbids mixing declarations and code [-Wdeclaration-after-statement]

PR-URL: https://github.com/libuv/libuv/pull/67
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>