do not call memcpy directly in curve25519_64_adx.h

Change-Id: I7837e600cb5f22aab38cb332de6f579d3cd62a67
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/63745
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

third_party/fiat/curve25519_64_adx.h

diff --git a/third_party/fiat/curve25519_64_adx.h b/third_party/fiat/curve25519_64_adx.h
index f50f5b8..8acfc1b 100644
--- a/third_party/fiat/curve25519_64_adx.h
+++ b/third_party/fiat/curve25519_64_adx.h
@@ -1,7 +1,9 @@
+#include <openssl/base.h>
+#include "../../crypto/internal.h"
+
 #include <stdbool.h>
 #include <stdint.h>
 #include <immintrin.h>
-#include <string.h>
 
 typedef uint64_t fe4[4];
 typedef uint8_t fiat_uint1;
@@ -468,7 +470,7 @@
 void x25519_scalar_mult_adx(uint8_t out[32], const uint8_t scalar[32],
                             const uint8_t point[32]) {
   uint8_t e[32];
-  memcpy(e, scalar, 32);
+  OPENSSL_memcpy(e, scalar, 32);
   e[0] &= 248;
   e[31] &= 127;
   e[31] |= 64;

third_party/fiat/p256_64.h

diff --git a/third_party/fiat/p256_64.h b/third_party/fiat/p256_64.h
index a691407..6667b31 100644
--- a/third_party/fiat/p256_64.h
+++ b/third_party/fiat/p256_64.h
@@ -1,3 +1,4 @@
+#include <openssl/base.h>
 #include "../../crypto/internal.h"
 #if !defined(OPENSSL_NO_ASM) && defined(__GNUC__) && defined(__x86_64__)
 void fiat_p256_adx_mul(uint64_t*, const uint64_t*, const uint64_t*);