Fix math tests.

Bug: 13657654
Change-Id: I39b2f13b5b3d3e6897618ac3aed49a0a08458dd0
Merge "Fix math tests."
Small accept4 fixes.

Put the accept4 test in the sorted order, and put the accept4 define in
sorted order.

Also add the missing SYS_RECVMMSG and SYS_SENDMMSG defines.

Change-Id: Iba55354975e0d5027dbee53f6de752c2df719493
Merge "Small accept4 fixes."
Move accept4 tests into sys_socket_test.cpp.

In addition, create basic recvmmsg, sendmmsg tests.

Change-Id: Ie9f4954446d98b5eb5e553d3c616c1ee67c3cb66
Merge "Move accept4 tests into sys_socket_test.cpp."
auto-merger: merge in from aosp/master