Fix VNDK Compilation Errors

VNDK restrictions doesn't includes standard headers by
default, add them explicitly.

Change-Id: Icafac6f07fcdf58fccaabde8d472509090fb3e6f
diff --git a/post_proc/bundle.c b/post_proc/bundle.c
index 000020d..ce0d0ec 100644
--- a/post_proc/bundle.c
+++ b/post_proc/bundle.c
@@ -44,6 +44,8 @@
 #include <system/thread_defs.h>
 #include <tinyalsa/asoundlib.h>
 #include <hardware/audio_effect.h>
+#include <pthread.h>
+#include <unistd.h>
 
 #include "bundle.h"
 #include "hw_accelerator.h"