Include stddef.h to make the size_t visible.  Resolves a simulator
build break caused by a use of ashmem.h in an environment without
size_t.
diff --git a/include/cutils/ashmem.h b/include/cutils/ashmem.h
index fd56dbe..30db184 100644
--- a/include/cutils/ashmem.h
+++ b/include/cutils/ashmem.h
@@ -10,6 +10,7 @@
 #ifndef _CUTILS_ASHMEM_H
 #define _CUTILS_ASHMEM_H
 
+#include <stddef.h>
 #include <stdint.h>
 
 #ifdef __cplusplus