🐛 Fixed configure for Xcode, CMake generate

[saltpi]

• [ ] The Jira issue number for this PR is: MDEV-______

Description

Execute command cmake . -G Xcode

with error information:

CMake Error in sql/CMakeLists.txt:
  The custom command generating

    /Volumes/Code/MariaDB/sql/yy_mariadb.yy

  is attached to multiple targets:

    gen_lex_token
    dist

  but none of these is a common dependency of the other(s).  This is not
  allowed by the Xcode "new build system".

How can this PR be tested?

Execute command cmake . -G Xcode

If the changes are not amenable to automated testing, please explain why not and carefully describe how to test manually.

Basing the PR against the correct MariaDB version

• [ ] This is a new feature and the PR is based against the latest MariaDB development branch.
• [ ] This is a bug fix and the PR is based against the earliest maintained branch in which the bug can be reproduced.

PR quality check

• [x] I checked the CODING_STANDARDS.md file and my PR conforms to this where appropriate.
• [x] For any trivial modifications to the PR, I am ok with the reviewer making the changes themselves.

[CLAassistant]

All committers have signed the CLA.

[vaintroub]

I think it is a backwards dependency. nothing should depend on "dist". "dist" can depend on something else