ada: Add kludge for quirk of ancient 32-bit ABIs to previous change

Some ancient 32-bit ABIs, most notably that of x86/Linux, misalign double
scalars in record types, so comparing DECL_ALIGN with TYPE_ALIGN directly
may give the wrong answer for them.

gcc/ada/

	* gcc-interface/trans.cc (addressable_p) <COMPONENT_REF>: Add kludge
	to cope with ancient 32-bit ABIs.