patch 8.0.0109

Problem:    Still checking if memcmp() exists while every system should have
            it now.
Solution:   Remove vim_memcmp().  (James McCoy, closes #1295)

src/tag.c

@@ -2400,7 +2400,7 @@ parse_line:
 			      mfp2 = ((struct match_found **)
 						  (ga_match[mtt].ga_data))[i];
 			      if (mfp2->len == mfp->len
-				      && vim_memcmp(mfp2->match, mfp->match,
+				      && memcmp(mfp2->match, mfp->match,
 						       (size_t)mfp->len) == 0)
 				  break;
 			      fast_breakcheck();