Update git submodules

* Update org.eclipse.mylyn from branch 'master'
  to 938b9e9d4278de460296260ec5b388f5ed3b70ee
  - 519262: update org.eclipse.mylyn versions to 3.25
    
    Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=519262
    
1 file changed