Include arm_arch.h in e_aes.c.

Not sure why this is working in CMake build, but the Chromium trybots
aren't happy without it.

Change-Id: I810740786c4f3cb9ba786891fdcd6053eea3afcb

crypto/cipher/e_aes.c

@@ -59,6 +59,10 @@
 #include "internal.h"
 #include "../modes/internal.h"
 
+#if defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
+#include "../arm_arch.h"
+#endif
+
 
 typedef struct {
   union {