Fortran, typeprint: Fix wrong indentation when ptype nested structures.

Fortran, typeprint: Fix wrong indentation when ptype nested structures.

Level of indentation was not proper handled when printing
the elements type's name.

Before:
type = Type t1
integer(kind=4) :: var_1
integer(kind=4) :: var_2
End Type t1

After:
type = Type t1
    integer(kind=4) :: var_1
    integer(kind=4) :: var_2
End Type t1

2016-05-25  Bernhard Heckel  <bernhard.heckel@intel.com>

gdb/Changelog:
	* f-typeprint.c (f_type_print_base): Take print level into account.

gdb/testsuite/Changelog:
	* gdb.fortran/print_type.exp: Fix expected output.
	* gdb.fortran/whatis_type.exp: Fix expected output.