Merge changes from topic "extra_free_kbytes.sh"

* changes:
  Use extra_free_kbytes.sh whenever sys.sysctl.extra_free_kbytes changes
  init: Add extra_free_kbytes.sh script to adjust watermark_scale_factor
diff --git a/fastboot/socket.cpp b/fastboot/socket.cpp
index 5a14b63..3096905 100644
--- a/fastboot/socket.cpp
+++ b/fastboot/socket.cpp
@@ -28,6 +28,10 @@
 
 #include "socket.h"
 
+#ifndef _WIN32
+#include <sys/select.h>
+#endif
+
 #include <android-base/errors.h>
 #include <android-base/stringprintf.h>