Updated link to GDB

14-checkpoint/README.md

@@ -20,7 +20,7 @@ on Homebrew's repos)
 
 ```sh
 cd /tmp/src
-curl -O http://ftp.rediris.es/mirror/GNU/gnu/gdb/gdb-7.8.tar.gz
+curl -O http://ftp.rediris.es/mirror/GNU/gdb/gdb-7.8.tar.gz
 tar xf gdb-7.8.tar.gz
 mkdir gdb-build
 cd gdb-build