patch 8.0.0510: typo in link to codecov.io results

Problem:    Typo in link to codecov.io results.
Solution:   Remove duplicate https:.

Author: brammool

README.md

@@ -1,6 +1,6 @@
 `README.md` for version 8.0 of Vim: Vi IMproved.
 [![Build Status](https://travis-ci.org/vim/vim.svg?branch=master)](https://travis-ci.org/vim/vim)
-[![Coverage Status](https://https://codecov.io/gh/vim/vim/coverage.svg?branch=master)](https://codecov.io/gh/vim/vim?branch=master)
+[![Coverage Status](https://codecov.io/gh/vim/vim/coverage.svg?branch=master)](https://codecov.io/gh/vim/vim?branch=master)
 [![Coverage Status](https://coveralls.io/repos/vim/vim/badge.svg?branch=master&service=github)](https://coveralls.io/github/vim/vim?branch=master)
 [![Appveyor Build status](https://ci.appveyor.com/api/projects/status/o2qht2kjm02sgghk?svg=true)](https://ci.appveyor.com/project/chrisbra/vim)
 [![Coverity Scan](https://scan.coverity.com/projects/241/badge.svg)](https://scan.coverity.com/projects/vim)

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    510,
 /**/
     509,
 /**/