Debugging MariaDB 10.1 on macOS Sierra

Debug MariaDB on macOS Sierra

These are the steps I took to be able to have lldb breakpoint on a function name in macOS Sierra:

```
cmake . -DCMAKE_BUILD_TYPE=Debug -DTOKUDB_OK=0 -DWITH_LIBARCHIVE=OFF; 
make
cd mysql-test
./mtr --manual-debug 1st
```

This will log a number of parameters, like the path to the mysqld executable and the parameters to pass to it.
Open a new tab, launch lldb and launch the binary with the parameters:

`$ lldb <path to executable found in output above> <parameters returned in output above>`

Then set a breakpoint on a method name, native_password_authenticate in this case:

`(lldb) br set --name native_password_authenticate`

Finally, start the executable
`(lldb) run`

Upon executing your client code lldb should stop on the method you chose, assuming the code path goes through it.

Possibly replace -DTOKUDB_OK=0 with -DPLUGIN_TOKUDB=NO.

Nah, TOKUDB is broken, so it should stay -DTOKUDB_OK=0

I tried to compile with -DPLUGIN_TOKUDB=NO and worked well.