Resolve dynamic target types of pointers.

When dereferencing pointers to dynamic target types,
resolve the target type.

2016-06-30  Bernhard Heckel  <bernhard.heckel@intel.com>

gdb/Changelog:
	* NEWS: Added entry.
	* c-valprint.c (c_print_val): Resolve dynamic target types.
	* valops.c (value_ind): Resolve dynamic target types.
	* valprint.c (check_printable): Don't shortcut not associated
	  pointers.

gdb/Testsuite/Changelog:
	* pointers.f90: Added pointer to dynamic types.
	* gdb.fortran/pointers.exp: New.

Change-Id: I998d4da4a5ba4899b8cb2115576f44efa741e698