c++/modules: Propagate some missing flags on type definitions

c++/modules: Propagate some missing flags on type definitions

Noticed while testing my fix for PR c++/113814.  Not all of these are
easily testable but I've tested a couple that were straight-forward.

For consistency also adds a new TYPE_WARN_IF_NOT_ALIGN_RAW flag to match
the decl version Nathan added.

gcc/cp/ChangeLog:

	* module.cc (trees_in::read_class_def): Propagate some missing
	flags from the streamed-in definition.

gcc/ChangeLog:

	* tree.h (TYPE_WARN_IF_NOT_ALIGN_RAW): New accessor.
	(TYPE_WARN_IF_NOT_ALIGN): Use it.
	(SET_TYPE_WARN_IF_NOT_ALIGN): Likewise.

gcc/testsuite/ChangeLog:

	* g++.dg/modules/class-10_a.H: New test.
	* g++.dg/modules/class-10_b.C: New test.

Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>