Disable building the rodobstacle program

It is so uncompileable that I am not able to fix it quickly.  Since I don't
actually need it right now I let it wait for another day.

src/CMakeLists.txt

@@ -3,8 +3,8 @@ set(programs compute-disc-error
              gradient-flow
              harmonicmaps
              mixed-cosserat-continuum
-             rod-eoc
-             rodobstacle)
+             rod-eoc)
+#            rodobstacle)
 
 foreach(_program ${programs})
   add_executable(${_program} ${_program}.cc)