Add missing <malloc.h> include.

Change-Id: I0259da35f2dc8ff87c928eb5bd378f39cbfc9f9c
diff --git a/server/InterfaceController.cpp b/server/InterfaceController.cpp
index 14f0da7..f0b313f 100644
--- a/server/InterfaceController.cpp
+++ b/server/InterfaceController.cpp
@@ -16,6 +16,7 @@
 
 #include <dirent.h>
 #include <errno.h>
+#include <malloc.h>
 
 #define LOG_TAG "InterfaceController"
 #include <cutils/log.h>