Add unit test mesh files to "make dist" list

Author: jwpeterson

tests/Makefile.am

@@ -142,7 +142,9 @@ data = meshes/1_quad.bxt.gz \
        meshes/bad_64bit_elem_integers.e \
        meshes/good_32bit_elem_integers.e \
        meshes/mesh_assign_test_mesh.xda \
-       meshes/shark_tooth_tri6.xda.gz
+       meshes/shark_tooth_tri6.xda.gz \
+       meshes/tetgen_one_tet10.ele \
+       meshes/tetgen_one_tet10.node
 
 unit_tests_sources += \
   $(data)