[headercheck] Fix missing headers

exercises/exercise-coupling-ff-pm/interface/freeflowsubproblem.hh

@@ -24,6 +24,7 @@
 #define DUMUX_STOKES_SUBPROBLEM_HH
 
 #include <dumux/freeflow/navierstokes/problem.hh>
+#include <dumux/freeflow/navierstokes/boundarytypes.hh>
 #include <dumux/common/properties.hh>
 #include <dumux/common/boundarytypes.hh>
 #include <dumux/common/numeqvector.hh>

exercises/exercise-coupling-ff-pm/models/freeflowsubproblem.hh

@@ -30,6 +30,7 @@
 #include <dumux/common/numeqvector.hh>
 
 #include <dumux/freeflow/navierstokes/problem.hh>
+#include <dumux/freeflow/navierstokes/boundarytypes.hh>
 
 namespace Dumux {
 /*!

exercises/exercise-coupling-ff-pm/turbulence/freeflowsubproblem.hh

@@ -32,6 +32,7 @@
 // TODO: dumux-course-task 3.A
 // Include headers for turbulence problem (rans) here.
 #include <dumux/freeflow/navierstokes/problem.hh>
+#include <dumux/freeflow/navierstokes/boundarytypes.hh>
 
 namespace Dumux {
 /*!

exercises/solution/exercise-coupling-ff-pm/interface/freeflowsubproblem.hh

@@ -29,6 +29,7 @@
 #include <dumux/common/numeqvector.hh>
 
 #include <dumux/freeflow/navierstokes/problem.hh>
+#include <dumux/freeflow/navierstokes/boundarytypes.hh>
 
 namespace Dumux {
 /*!

exercises/solution/exercise-coupling-ff-pm/models/freeflowsubproblem.hh

@@ -30,6 +30,7 @@
 #include <dumux/common/numeqvector.hh>
 
 #include <dumux/freeflow/navierstokes/problem.hh>
+#include <dumux/freeflow/navierstokes/boundarytypes.hh>
 
 namespace Dumux {
 /*!

exercises/solution/exercise-coupling-ff-pm/turbulence/freeflowsubproblem.hh

@@ -34,6 +34,7 @@
 #include <dumux/common/boundarytypes.hh>
 #include <dumux/common/numeqvector.hh>
 #include <dumux/multidomain/boundary/stokesdarcy/couplingdata.hh>
+#include <dumux/freeflow/navierstokes/boundarytypes.hh>
 
 namespace Dumux {