Add myriad2 cpu config awareness.

Change-Id: Id8ae10125d3d9cc4a99a1d45d468f7f38aca7829
Reviewed-on: https://boringssl-review.googlesource.com/8892
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/include/openssl/base.h b/include/openssl/base.h
index 4fe2230..ac6f250 100644
--- a/include/openssl/base.h
+++ b/include/openssl/base.h
@@ -94,6 +94,8 @@
 #elif defined(__pnacl__)
 #define OPENSSL_32_BIT
 #define OPENSSL_PNACL
+#elif defined(__myriad2__)
+#define OPENSSL_32_BIT
 #else
 #error "Unknown target CPU"
 #endif