abg-ir.h: add some operator!= definitions

This prevents ambiguous lookup failures with more recent compiler /
language versions.

	* include/abg-ir.h: (qualified_type_def) Add operator!=.
	(pointer_type_def): Likewise.
	(reference_type_def): Likewise.
	(class_or_union): Likewise.

Bug: 295399968
Change-Id: I9019e4469ee159a9f6d927512d2639386102cd70
Signed-off-by: Giuliano Procida <gprocida@google.com>
1 file changed