Define more ioctl codes on riscv32gc-unknown-linux-gnu

Define ioctl codes including `FICLONE` and `FS_IOC32_GETVERSION` on
riscv32gc-unknown-linux-gnu.

Author: sunfishcode

src/unix/linux_like/linux/arch/generic/mod.rs

@@ -164,6 +164,7 @@ cfg_if! {
         target_arch = "x86_64",
         target_arch = "arm",
         target_arch = "aarch64",
+        target_arch = "riscv32",
         target_arch = "riscv64",
         target_arch = "s390x",
         target_arch = "csky",
@@ -303,7 +304,8 @@ cfg_if! {
     if #[cfg(any(
         target_arch = "x86",
         target_arch = "arm",
-        target_arch = "csky"
+        target_arch = "csky",
+        target_arch = "riscv32"
     ))] {
         pub const FS_IOC_GETFLAGS: Ioctl = 0x80046601;
         pub const FS_IOC_SETFLAGS: Ioctl = 0x40046602;