Hal: Add missing header <limits.h> am: b5c2819293
am: a233631904

Change-Id: Ic9d00037949cd42f7bd3d2f69858e40dcd8aacfa
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index 2b1d537..ba2d909 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -33,6 +33,7 @@
 #include <dlfcn.h>
 #include <sys/resource.h>
 #include <sys/prctl.h>
+#include <limits.h>
 
 #include <cutils/log.h>
 #include <cutils/trace.h>