Add SOL_XDP to linux musl

Author: arctic-alpaca

libc-test/semver/linux-musl.txt

@@ -23,6 +23,7 @@ PF_XDP
 PIDFD_NONBLOCK
 PR_SET_VMA
 PR_SET_VMA_ANON_NAME
+SOL_XDP
 XDP_SHARED_UMEM
 XDP_COPY
 XDP_ZEROCOPY

src/unix/linux_like/linux/musl/mod.rs

@@ -780,6 +780,8 @@ pub const TIME_ERROR: ::c_int = 5;
 pub const TIME_BAD: ::c_int = TIME_ERROR;
 pub const MAXTC: ::c_long = 6;
 
+pub const SOL_XDP: ::c_int = 283;
+
 // linux/if_xdp.h
 pub const XDP_SHARED_UMEM: ::__u16 = 1 << 0;
 pub const XDP_COPY: ::__u16 = 1 << 1;