linux hexagon: add missing defines

This commit defines ETIMEDOUT, SIGSTKSZ, MINSIGSTKSZ

Author: androm3da

src/unix/linux_like/linux/musl/b32/hexagon.rs

@@ -222,6 +222,7 @@ pub const ESOCKTNOSUPPORT: ::c_int = 94;
 pub const ESTALE: ::c_int = 116;
 pub const ESTRPIPE: ::c_int = 86;
 pub const ETOOMANYREFS: ::c_int = 109;
+pub const ETIMEDOUT: ::c_int = 110;
 pub const EUCLEAN: ::c_int = 117;
 pub const EUNATCH: ::c_int = 49;
 pub const EUSERS: ::c_int = 87;
@@ -299,6 +300,8 @@ pub const SIGPOLL: ::c_int = 29;
 pub const SIGPROF: ::c_int = 27;
 pub const SIGPWR: ::c_int = 30;
 pub const SIGSTKFLT: ::c_int = 16;
+pub const SIGSTKSZ: ::size_t = 8192;
+pub const MINSIGSTKSZ: ::size_t = 2048;
 pub const SIGSTOP: ::c_int = 19;
 pub const SIGSYS: ::c_int = 31;
 pub const SIGTSTP: ::c_int = 20;