fpmake: fixes for ideintf being a package, and the debugger-packages

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47250 4005530d-fff6-0310-9dd1-cebe43e6787f
fpmake: Switch from building based on the removed ide.lpk-package to building the lazarus-executable from within the ide-directory

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47251 4005530d-fff6-0310-9dd1-cebe43e6787f