[Rpm-maint] [rpm-software-management/rpm] doPatch: send patch name to %__patch (#1350)

[Michal Domonkos]

@dmnks commented on this pull request.



>      } else {
-	patchcmd = rpmExpand("%{__patch} ", args, " < ", fn, NULL);
+	patchcmd = rpmExpand("RPM_PATCH_NAME=", sp->path, " %{__patch} ", args, " < ", fn, NULL);

`sp->path` is the same as `fn`, and it's what's passed to `stdin` of the `%__patch` binary, which means you can easily get that value by running `readlink -f /dev/stdin` in your binary. Handy, isn't it? :)

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