Fix the simulator build broken by commit 5fe37c6838de9fbd959ad19ba44aa3d00d1b4e6f

Change-Id: Ibf6aebfec60cd7f807c3e49f0dbb5ab8e86bcdc1
diff --git a/media/libeffects/EffectEqualizer.cpp b/media/libeffects/EffectEqualizer.cpp
index 3a5da4d..c08f4f5 100644
--- a/media/libeffects/EffectEqualizer.cpp
+++ b/media/libeffects/EffectEqualizer.cpp
@@ -20,6 +20,7 @@
 #include <cutils/log.h>
 #include <assert.h>
 #include <stdlib.h>
+#include <string.h>
 #include <new>
 #include "AudioEqualizer.h"
 #include "AudioBiquadFilter.h"