Add IP_BOUND_IF for Apple

Author: pinkisemils

libc-test/semver/apple.txt

@@ -487,6 +487,7 @@ IPV6_RECVPKTINFO
 IPV6_RECVTCLASS
 IPV6_TCLASS
 IP_HDRINCL
+IP_BOUND_IF
 IP_PKTINFO
 IP_RECVDSTADDR
 IP_RECVIF

src/unix/bsd/apple/mod.rs

@@ -2432,6 +2432,7 @@ pub const IP_RECVDSTADDR: ::c_int = 7;
 pub const IP_ADD_MEMBERSHIP: ::c_int = 12;
 pub const IP_DROP_MEMBERSHIP: ::c_int = 13;
 pub const IP_RECVIF: ::c_int = 20;
+pub const IP_BOUND_IF: ::c_int = 25;
 pub const IP_PKTINFO: ::c_int = 26;
 pub const IP_RECVTOS: ::c_int = 27;
 pub const IPV6_JOIN_GROUP: ::c_int = 12;