gdb/fortran: Update rules for printing whitespace in types

gdb/fortran: Update rules for printing whitespace in types

The whitespace produced as types are printed seems inconsistent.  This
commit updates the rules in an attempt to make whitespace more
balanced and consistent.  Expected results are updated.

gdb/ChangeLog:

	* f-typeprint.c (f_print_type): Update rules for printing
	whitespace.
	(f_type_print_varspec_suffix): Likewise.

gdb/testsuite/ChangeLog:

	* gdb.fortran/ptr-indentation.exp: Update expected results.
	* gdb.fortran/ptype-on-functions.exp: Likewise.
	* gdb.fortran/vla-ptr-info.exp: Likewise.
	* gdb.fortran/vla-value.exp: Likewise.