[tests][interop] fix sockets.def placement closer to test (fix build)

backend.native/tests/build.gradle

@@ -2070,7 +2070,7 @@ kotlinNativeInterop {
     }
 
     sockets {
-        defFile '../../samples/socket/src/main/c_interop/sockets.def'
+        defFile 'interop/basics/sockets.def'
         flavor 'native'
     }
 

backend.native/tests/interop/basics/sockets.def

@@ -7,6 +7,6 @@ static int interop_errno() {
         return errno;
 }
 
-static int interop_htons(int x) {
+static short interop_htons(short x) {
 	return htons(x);
 }