Add the new-to-ATK relation types to the ATK headers we maintain and
map those relation types to the internal equivalents. No new tests
because we have sufficient coverage for the internal relations and
currently lack a means to test platform accessibility API exposure.
This is a somewhat new header upstream that we need to import to support the
AtkTableCell interface. The one tricky bit is that upstream has started using
AVAILABLE_IN_ATK_X_Y macros defined in a generated header. To avoid needing
to generate that header on every build or checking in generated code we just
define the macros manually in atk.h.
This is a somewhat new header upstream that we need to import to support the
AtkTableCell interface. The one tricky bit is that upstream has started using
AVAILABLE_IN_ATK_X_Y macros defined in a generated header. To avoid needing
to generate that header on every build or checking in generated code we just
define the macros manually in atk.h.