Fortran: Break recursion building recursive types. [PR106606]

Fortran: Break recursion building recursive types. [PR106606]

Build a derived type component's type only, when it is not already being
built and the component uses pointer semantics.

gcc/fortran/ChangeLog:

	PR fortran/106606

	* trans-types.cc (gfc_get_derived_type): Only build non-pointer
	derived types as component's types when they are not yet built.

gcc/testsuite/ChangeLog:

	* gfortran.dg/recursive_alloc_comp_5.f90: New test.