third_party/openssl: add ChaCha20+Poly1305 support.

openssl/crypto/cryptlib.c

Index: openssl/crypto/cryptlib.c
diff --git a/openssl/crypto/cryptlib.c b/openssl/crypto/cryptlib.c
index 304c6b70627b2aeb88abe71a6863cfef2302bd6f..6752ca44fcc94cc782ecd805dceab8afdf67e035 100644
--- a/openssl/crypto/cryptlib.c
+++ b/openssl/crypto/cryptlib.c
@@ -661,6 +661,20 @@ const char *CRYPTO_get_lock_name(int type)
 		return(sk_OPENSSL_STRING_value(app_locks,type-CRYPTO_NUM_LOCKS));
 	}
 
+#if __arm__
+static int global_arm_neon_enabled = 0;
+
+void CRYPTO_set_NEON_capable(int on)
+	{
+	global_arm_neon_enabled = on != 0;
+	}
+
+int CRYPTO_is_NEON_capable()
+	{
+	return global_arm_neon_enabled;
+	}
+#endif
+
 #if	defined(__i386)   || defined(__i386__)   || defined(_M_IX86) || \
 	defined(__INTEL__) || \
 	defined(__x86_64) || defined(__x86_64__) || defined(_M_AMD64) || defined(_M_X64)