libapt-pkg5.0: Add Breaks appstream (<< 0.9.0-3~)

This ensures that a compatible version of appstream is
installed, that is, one that disables lz4 compression
for its data.

debian/control

@@ -43,7 +43,7 @@ Architecture: any
 Multi-Arch: same
 Pre-Depends: ${misc:Pre-Depends}
 Depends: ${shlibs:Depends}, ${misc:Depends}
-Breaks: apt (<< 1.1~exp14), libapt-inst1.5 (<< 0.9.9~)
+Breaks: apt (<< 1.1~exp14), libapt-inst1.5 (<< 0.9.9~), appstream (<< 0.9.0-3~)
 Recommends: apt (>= ${binary:Version})
 Section: libs
 Description: package management runtime library