Added a simple led plugin to control Linux LEDs based on IKE activity

src/libcharon/Makefile.am

@@ -354,6 +354,13 @@ if MONOLITHIC
 endif
 endif
 
+if USE_LED
+  SUBDIRS += plugins/led
+if MONOLITHIC
+  libcharon_la_LIBADD += plugins/led/libstrongswan-led.la
+endif
+endif
+
 if USE_UCI
   SUBDIRS += plugins/uci
 if MONOLITHIC