Update: submodule tree shaking test package

To reproduce issue with H5fortran. Need to recurse all the way down the submodule hierarchy.

Author: LKedward

ci/run_tests.sh

@@ -76,8 +76,6 @@ test ! -e ./build/gfortran_*/submodule_tree_shake/src_parent_unused.f90.o
 test ! -e ./build/gfortran_*/submodule_tree_shake/src_parent_unused.f90.o.log
 test ! -e ./build/gfortran_*/submodule_tree_shake/src_child_unused.f90.o
 test ! -e ./build/gfortran_*/submodule_tree_shake/src_child_unused.f90.o.log
-test ! -e ./build/gfortran_*/submodule_tree_shake/src_grandchild.f90.o
-test ! -e ./build/gfortran_*/submodule_tree_shake/src_grandchild.f90.o.log
 popd
 
 pushd version_file

example_packages/submodule_tree_shake/src/child1.f90

@@ -10,7 +10,7 @@ end function my_fun
 contains
 
 module procedure my_sub1
-    a = 1
+    a = my_fun()
 end procedure my_sub1
 
 end submodule child1