Fix some uses of gnu extensions

• Reorder declarations to follow standard more strictly

• Replace non-standard kind declaration

• Replace non-standard kind declaration

• Fix non-standard declarations and declaration order

• Update utils commit to fetch fix for uuid_mod

Passing FORTRAN_SPEC=2008 to make when using gfortran sets the --std=f2008 flag. This then errors on any uses of gnu extensions. Clearly these are widely supported as other compilers also haven’t complained so far, but good to be strict where possible.