Fix getaddrinfo for IPv6 loopback address

Author: sbc100

src/library.js

@@ -1073,7 +1073,7 @@ addToLibrary({
         if (family === {{{ cDefs.AF_INET }}}) {
           addr = _htonl({{{ cDefs.INADDR_LOOPBACK }}});
         } else {
-          addr = [0, 0, 0, 1];
+          addr = [0, 0, 0, _htonl(1)];
         }
       }
       ai = allocaddrinfo(family, type, proto, null, addr, port);

test/sockets/test_getaddrinfo.c

@@ -122,10 +122,7 @@ int main() {
   print_addrinfo(servinfo);
   assert(servinfo->ai_family == AF_INET6);
   assert(servinfo->ai_socktype == SOCK_STREAM);
-#ifndef __EMSCRIPTEN__
-  // TODO(sbc): This assert currently fails under emscripten, but should not
   assert(memcmp(&sa6->sin6_addr, &in6addr_loopback, sizeof(in6addr_loopback)) == 0);
-#endif
   assert(sa6->sin6_port == ntohs(81));
   freeaddrinfo(servinfo);