Fortran: Resolve dynamic properties of pointer types.

In Fortran a pointer may have a dynamic associated property.

2016-07-08  Bernhard Heckel  <bernhard.heckel@intel.com>

gdb/Changelog:
	* gdbtypes.c (resolve_dynamic_types_internal): Resolve pointer types.
	  (resolve_dynamic_pointer): New.

Change-Id: Ie4b9d6397cfa089ee2e0db02beb18415a751c1c0