external/boringssl: Sync to 8ca0b41.

This includes the following changes:

https://boringssl.googlesource.com/boringssl/+log/9d908ba519f2cfe5e21561bdee3e224b94d14a89..8ca0b4127da11d766067ea6ec4122017ba0edb0e

Change-Id: I732653bc8fcba70707c615f8731ca75397a08736
diff --git a/src/crypto/crypto.c b/src/crypto/crypto.c
index e98e249..c9f2bc8 100644
--- a/src/crypto/crypto.c
+++ b/src/crypto/crypto.c
@@ -131,6 +131,14 @@
 #endif
 }
 
+int CRYPTO_has_asm(void) {
+#if defined(OPENSSL_NO_ASM)
+  return 0;
+#else
+  return 1;
+#endif
+}
+
 const char *SSLeay_version(int unused) {
   return "BoringSSL";
 }