codetools: made RunTool thread-safe

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45539 4005530d-fff6-0310-9dd1-cebe43e6787f
codetools: comments

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45540 4005530d-fff6-0310-9dd1-cebe43e6787f