fix tests and return new syscalls back

berkeley sockets interception implementation

Adds hooks for all the socket-related functions. By default hooks return ENOSYS, but can be intercepted in the application.

Return these:
e98ec8c fixed signatures for several syscalls that return positive value in correct case
256e1ec removed epoll_create1 (EPOLL_CLOEXEC is not applicable to NaCl, as there is no possibility to fork); added recv and send to syscalls.list
0533bbb added several system call hooks for future sockets implementation

BUG=
TEST=trybot

Committed: https://git.chromium.org/gitweb?p=native_client/nacl-glibc.git;a=commit;h=1de757e

[vissi, 2012-04-22 09:48:55]

Hi!
Buildbot button didn't attach, but you can see here:
http://build.chromium.org/p/tryserver.nacl/builders/nacl-toolchain-lucid64-gl...
that small tests passed. I tested using toolchain-git-try.sh

[khim, 2012-04-22 15:58:30]

Please include description from the original CLs.

LGTM except for CL description: it's not a small fix for the bug, it's
full-blown implementation of the socket interception feature, it's description
should reflect this fact.