os-prober's version has incremented. Patch had to be re-done for some failed hunks: will consider developing a sed in the meantime to take care of future releases ebuild can be renamed with no changes.
Created attachment 222185 [details, diff] os-prober-1.36-multilib.patch
Created attachment 222261 [details, diff] drop patch from ebuild, use sed instead to avoid patch issues in the future, dropped epatch from src_prepare and used sed to do the job epatch was doing. Simple modifications, should save space vs patch.
Created attachment 222349 [details, diff] missed an unescaped . in a sed.
Now in the tree.