IDE: less hints

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43335 4005530d-fff6-0310-9dd1-cebe43e6787f
LCL: gtk2: link with libcairo-gobject on Linux and fpc 2.7.1

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43336 4005530d-fff6-0310-9dd1-cebe43e6787f