update README for tokudb 7.5.0

README.md

@@ -24,14 +24,14 @@ working MySQL or MariaDB with Tokutek patches, and with the TokuDB storage
 engine, called `make.mysql.bash`.  This script will download copies of the
 needed source code from github and build everything.
 
-To build MySQL 5.5.38 with TokuDB 7.1.7:
+To build MySQL 5.5.39 with TokuDB 7.5.0:
 ```sh
-scripts/make.mysql.bash --mysqlbuild=mysql-5.5.38-tokudb-7.1.7-linux-x86_64
+scripts/make.mysql.bash --mysqlbuild=mysql-5.5.39-tokudb-7.5.0-linux-x86_64
 ```
 
-To build MariaDB 5.5.38 with TokuDB 7.1.7:
+To build MariaDB 5.5.39 with TokuDB 7.5.0:
 ```sh
-scripts/make.mysql.bash --mysqlbuild=mariadb-5.5.38-tokudb-7.1.7-linux-x86_64
+scripts/make.mysql.bash --mysqlbuild=mariadb-5.5.39-tokudb-7.5.0-linux-x86_64
 ```
 
 Before you start, make sure you have a C++11-compatible compiler (GCC >=