handle in a consistent way the new rootcint options -cint (default),
-reflex and -gccxml. The type of dictionary to be used can be specified
like: ./configure --with-dicttype=reflex. Notice that this option is
there only for the developers working on the migration to the new
dictionary system.


git-svn-id: http://root.cern.ch/svn/root/trunk@13609 27541ba8-7e3a-0410-8455-c3a389f83636