Fixed linux_x86_icc compiler errors in EC code related to __uint128_t/__int128_t

Reviewed-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NPaul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8697)

(cherry picked from commit 3a86f1db282569c538273cc48462a3fa5fcffa39)

crypto/ec/curve25519.c

 /*
- * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -254,6 +254,7 @@ static void x25519_scalar_mulx(uint8_t out[32], const uint8_t scalar[32],
 #if defined(X25519_ASM) \
     || ( (defined(__SIZEOF_INT128__) && __SIZEOF_INT128__ == 16) \
          && !defined(__sparc__) \
+         && (!defined(__SIZEOF_LONG__) || (__SIZEOF_LONG__ == 8)) \
          && !(defined(__ANDROID__) && !defined(__clang__)) )
 /*
  * Base 2^51 implementation. It's virtually no different from reference

crypto/ec/curve448/curve448utils.h

 /*
- * Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved.
  * Copyright 2015 Cryptography Research, Inc.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
@@ -24,7 +24,9 @@
  */
 # ifndef C448_WORD_BITS
 #  if (defined(__SIZEOF_INT128__) && (__SIZEOF_INT128__ == 16)) \
-      && !defined(__sparc__)
+      && !defined(__sparc__) \
+      && (!defined(__SIZEOF_LONG__) || (__SIZEOF_LONG__ == 8))
+
 #   define C448_WORD_BITS 64      /* The number of bits in a word */
 #  else
 #   define C448_WORD_BITS 32      /* The number of bits in a word */