Merge pull request #1993 from steffen-kiess/posix-sockets-1

Add socket-related functions and data structures to Mono.Posix

diff --cc configure.ac
Simple merge

diff --cc mcs/class/Mono.Posix/Mono.Posix_test.dll.sources
index 0f84821b52ee01392b762e7b76723da1306510b2,88e9eb1f1a0f0c5940f24b0b68bc3ac04ae26dfc..e2a49354a8eb43a4790567e1c361ac2a73e87856
--- 1/mcs/class/Mono.Posix/Mono.Posix_test.dll.sources
--- 2/mcs/class/Mono.Posix/Mono.Posix_test.dll.sources
+++ b/mcs/class/Mono.Posix/Mono.Posix_test.dll.sources
@@@ -6,6 -6,6 +6,7 @@@ Mono.Unix/UnixMarshalTest.c
  Mono.Unix/UnixPathTest.cs
  Mono.Unix/UnixSignalTest.cs
  Mono.Unix/UnixUserTest.cs
 +Mono.Unix.Android/TestHelper.cs
  Mono.Unix.Native/RealTimeSignumTests.cs
+ Mono.Unix.Native/SocketTest.cs
  Mono.Unix.Native/StdlibTest.cs