docs: Add override for feature symbols
The old Autotools build generated a cairo-supported-features.h file for the benefit of gtk-doc. These days, with a smaller features set, we can get away with an override file.
Fixes: #642 (closed)
The old Autotools build generated a cairo-supported-features.h file for the benefit of gtk-doc. These days, with a smaller features set, we can get away with an override file.
Fixes: #642 (closed)