libstd-rs: Forward port rust libc patches

libstd-rs update also updated the vendored libc to 0.2.116, the rv64
musl patches were applied to 0.2.112 and hence needed forward porting
done with this changeset.

(From OE-Core rev: e3a910af0c0c4e07b15d03e9625760f98c67e874)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/rust/libstd-rs/0001-Add-400-series-syscalls-to-musl-riscv64-definitions.patch

@@ -9,10 +9,10 @@ Signed-off-by: Khem Raj <raj.khem@gmail.com>
  .../linux_like/linux/musl/b64/riscv64/mod.rs  | 19 +++++++++++++++++++
  1 file changed, 19 insertions(+)
 
-diff --git a/vendor/libc-0.2.112/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs b/vendor/libc-0.2.112/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs
+diff --git a/vendor/libc-0.2.116/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs b/vendor/libc-0.2.116/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs
 index 6b17621c7..2036583d5 100644
---- a/vendor/libc-0.2.112/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs
-+++ b/vendor/libc-0.2.112/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs
+--- a/vendor/libc-0.2.116/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs
++++ b/vendor/libc-0.2.116/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs
 @@ -465,6 +465,25 @@ pub const SYS_pkey_mprotect: ::c_long = 288;
  pub const SYS_pkey_alloc: ::c_long = 289;
  pub const SYS_pkey_free: ::c_long = 290;