added freeflow folder to Makefile.am

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@7451 2fb0f335-1f38-0410-981e-8018bf24f1b0

dumux/Makefile.am

-SUBDIRS = boxmodels common decoupled io linear material nonlinear parallel
+SUBDIRS = boxmodels common decoupled freeflow io linear material nonlinear parallel
 
 dumuxdir = $(includedir)/dumux
 

test/Makefile.am

-SUBDIRS = boxmodels common decoupled material
+SUBDIRS = boxmodels common decoupled freeflow material
 
 EXTRA_DIST = CMakeLists.txt