remove reverse dependencies first

when removing large sets of packets, the ordering of removal
was not quaranteed to honor dependencies. this fixes the removal
order to be in reverse dependency order as far as possible.

src/solver.c

@@ -802,6 +802,11 @@ static void cset_gen_name_change(struct apk_solver_state *ss, struct apk_name *n
 		cset_track_deps_removed(ss, opkg);
 }
 
+static void cset_gen_name_remove0(struct apk_package *pkg0, struct apk_dependency *dep0, struct apk_package *pkg, void *ctx)
+{
+	cset_gen_name_remove(ctx, pkg0);
+}
+
 static void cset_gen_name_remove(struct apk_solver_state *ss, struct apk_package *pkg)
 {
 	struct apk_name *name = pkg->name, **pname;
@@ -813,6 +818,7 @@ static void cset_gen_name_remove(struct apk_solver_state *ss, struct apk_package
 
 	name->ss.in_changeset = 1;
 	pkg->ss.in_changeset = 1;
+	apk_pkg_foreach_reverse_dependency(pkg, APK_FOREACH_INSTALLED|APK_DEP_SATISFIES, cset_gen_name_remove0, ss);
 	foreach_array_item(pname, pkg->name->rinstall_if)
 		cset_check_removal_by_iif(ss, *pname);
 	record_change(ss, pkg, NULL);