clarify timeout setting message
clarify timeout setting message

todorez/gummiboot-multiboot2,miguelinux/gummiboot2systemd-boot,android-ia/platform_external_gummiboot,todorez/tummiboot,liliang365/my_gummiboot,karelzak/gummiboot,FrozenCow/gummiboot,miguelinux/gummiboot2systemd-boot,freedesktop-unofficial-mirror/gummiboot,android-ia/platform_external_gummiboot,trilean/gummiboot,trilean/gummiboot,todorez/gummiboot-multiboot2,aaronp24/gummiboot,liliang365/my_gummiboot,karelzak/gummiboot,aaronp24/gummiboot,todorez/tummiboot,FrozenCow/gummiboot,freedesktop-unofficial-mirror/gummiboot