Auto merge of #408 - kali:master, r=alexcrichton

add MSG_NOSIGNAL (linux, android)

see rust-lang/rust#36426

src/unix/notbsd/mod.rs

@@ -468,6 +468,8 @@ pub const IPV6_V6ONLY: ::c_int = 26;
 
 pub const SO_DEBUG: ::c_int = 1;
 
+pub const MSG_NOSIGNAL: ::c_int = 0x4000;
+
 pub const SHUT_RD: ::c_int = 0;
 pub const SHUT_WR: ::c_int = 1;
 pub const SHUT_RDWR: ::c_int = 2;