IDE: Use external debug symbols (-Xg) for Debug build mode.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42218 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: make the filter for all compiler options work with uppercase text.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42219 4005530d-fff6-0310-9dd1-cebe43e6787f