baud fixes

Author: tgross35

src/unix/linux_like/linux/gnu/mod.rs

@@ -1021,6 +1021,26 @@ pub const GLOB_TILDE_CHECK: c_int = 1 << 14;
 
 pub const MADV_COLLAPSE: c_int = 25;
 
+// bits/termios-baud.h
+pub const B0: crate::speed_t = 0o000000;
+pub const B50: crate::speed_t = 0o000001;
+pub const B75: crate::speed_t = 0o000002;
+pub const B110: crate::speed_t = 0o000003;
+pub const B134: crate::speed_t = 0o000004;
+pub const B150: crate::speed_t = 0o000005;
+pub const B200: crate::speed_t = 0o000006;
+pub const B300: crate::speed_t = 0o000007;
+pub const B600: crate::speed_t = 0o000010;
+pub const B1200: crate::speed_t = 0o000011;
+pub const B1800: crate::speed_t = 0o000012;
+pub const B2400: crate::speed_t = 0o000013;
+pub const B4800: crate::speed_t = 0o000014;
+pub const B9600: crate::speed_t = 0o000015;
+pub const B19200: crate::speed_t = 0o000016;
+pub const B38400: crate::speed_t = 0o000017;
+pub const EXTA: crate::speed_t = B19200;
+pub const EXTB: crate::speed_t = B38400;
+
 cfg_if! {
     if #[cfg(any(
         target_arch = "arm",