musl: loongarch64: Fix the struct ipc_perm bindings

[heiher]

Description

Remove the __pad2 field from struct ipc_perm.

Refer: https://git.musl-libc.org/cgit/musl/tree/arch/generic/bits/ipc.h?h=v1.2.5

struct ipc_perm {
	key_t __ipc_perm_key;
	uid_t uid;
	gid_t gid;
	uid_t cuid;
	gid_t cgid;
	mode_t mode;
	int __ipc_perm_seq;
	long __pad1;
	long __pad2;
};

Sources

• src/unix/linux_like/linux/musl/b64/loongarch64/mod.rs

Checklist

• Relevant tests in libc-test/semver have been updated
• No placeholder or unstable values like *LAST or *MAX are
  included (see #3131)
• Tested locally (cd libc-test && cargo test --target mytarget);
  especially relevant for platforms that may not be checked in CI

[rustbot]

r? @tgross35

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[tgross35]

LGTM, merging is blocked on a CI bug

[heiher]

@rustbot label +stable-nominated