IDE: build macros: do not let defaults override

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41337 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: debug

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41338 4005530d-fff6-0310-9dd1-cebe43e6787f