Bump redox_syscall to 0.8.1, libredox to 0.1.17 (upstream adaptation)

Cargo.toml

@@ -99,7 +99,7 @@ edid = "0.3.0" #TODO: edid is abandoned, fork it and maintain?
 fdt = "0.1.5"
 libc = "0.2.181"
 log = "0.4"
-libredox = "0.1.16"
+libredox = "0.1.17"
 orbclient = "0.3.51"
 parking_lot = "0.12"
 pico-args = "0.5"
@@ -110,7 +110,7 @@ redox-ioctl = { git = "https://gitlab.redox-os.org/redox-os/relibc.git" }
 redox-log = { git = "https://gitlab.redox-os.org/redox-os/redox-log.git" }
 redox-rt = { git = "https://gitlab.redox-os.org/redox-os/relibc.git", default-features = false }
 redox-scheme = "0.11.0"
-redox_syscall = { version = "0.7.4", features = ["std"] }
+redox_syscall = { version = "0.8.1", features = ["std"] }
 redox_termios = "0.1.3"
 ron = "0.8.1"
 serde = { version = "1", features = ["derive"] }