Define RTLD_* constants for riscv64-linux-gnu

Author: andreas-schwab

src/unix/linux_like/linux/gnu/b64/riscv64/mod.rs

@@ -218,6 +218,9 @@ s! {
 pub const POSIX_FADV_DONTNEED: ::c_int = 4;
 pub const POSIX_FADV_NOREUSE: ::c_int = 5;
 pub const VEOF: usize = 4;
+pub const RTLD_DEEPBIND: ::c_int = 0x8;
+pub const RTLD_GLOBAL: ::c_int = 0x100;
+pub const RTLD_NOLOAD: ::c_int = 0x4;
 pub const TIOCGSOFTCAR: ::c_ulong = 21529;
 pub const TIOCSSOFTCAR: ::c_ulong = 21530;
 pub const TIOCGRS485: ::c_int = 21550;