Use adb_sleep_ms for Cygwin compat

Change-Id: Iabb2cddfb6740a35e4b6b1563a81b64972c29453
diff --git a/adb/sockets.c b/adb/sockets.c
index 6bfc7c8..7219293 100644
--- a/adb/sockets.c
+++ b/adb/sockets.c
@@ -195,7 +195,7 @@
     if (s->kick_on_close && s->transport) {
         kick_transport(s->transport);
         /* delay to work around a race condition */
-        sleep(1);
+        adb_sleep_ms(1000);
     }
 #endif
     adb_mutex_lock(&socket_list_lock);