Lift IFA_* constants from linux/gnu to linux

(backport <#4185>)
(cherry picked from commit 70c1e82)

Author: jtt

libc-test/semver/linux-gnu.txt

@@ -78,12 +78,6 @@ HUGETLB_FLAG_ENCODE_64KB
 HUGETLB_FLAG_ENCODE_8MB
 HUGETLB_FLAG_ENCODE_MASK
 HUGETLB_FLAG_ENCODE_SHIFT
-IFA_FLAGS
-IFA_F_MANAGETEMPADDR
-IFA_F_MCAUTOJOIN
-IFA_F_NODAD
-IFA_F_NOPREFIXROUTE
-IFA_F_STABLE_PRIVACY
 INIT_PROCESS
 ISOFS_SUPER_MAGIC
 JFFS2_SUPER_MAGIC

libc-test/semver/linux.txt

@@ -923,12 +923,18 @@ IFA_ADDRESS
 IFA_ANYCAST
 IFA_BROADCAST
 IFA_CACHEINFO
+IFA_FLAGS
 IFA_F_DADFAILED
 IFA_F_DEPRECATED
 IFA_F_HOMEADDRESS
+IFA_F_MANAGETEMPADDR
+IFA_F_MCAUTOJOIN
+IFA_F_NODAD
+IFA_F_NOPREFIXROUTE
 IFA_F_OPTIMISTIC
 IFA_F_PERMANENT
 IFA_F_SECONDARY
+IFA_F_STABLE_PRIVACY
 IFA_F_TEMPORARY
 IFA_F_TENTATIVE
 IFA_LABEL

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

@@ -1035,14 +1035,6 @@ pub const NDA_SRC_VNI: c_ushort = 11;
 pub const UNAME26: c_int = 0x0020000;
 pub const FDPIC_FUNCPTRS: c_int = 0x0080000;
 
-// linux/if_addr.h
-pub const IFA_FLAGS: c_ushort = 8;
-
-pub const IFA_F_MANAGETEMPADDR: u32 = 0x100;
-pub const IFA_F_NOPREFIXROUTE: u32 = 0x200;
-pub const IFA_F_MCAUTOJOIN: u32 = 0x400;
-pub const IFA_F_STABLE_PRIVACY: u32 = 0x800;
-
 pub const MAX_LINKS: c_int = 32;
 
 pub const GENL_UNS_ADMIN_PERM: c_int = 0x10;

src/unix/linux_like/linux/mod.rs

@@ -2768,6 +2768,7 @@ pub const IFA_BROADCAST: c_ushort = 4;
 pub const IFA_ANYCAST: c_ushort = 5;
 pub const IFA_CACHEINFO: c_ushort = 6;
 pub const IFA_MULTICAST: c_ushort = 7;
+pub const IFA_FLAGS: c_ushort = 8;
 
 pub const IFA_F_SECONDARY: u32 = 0x01;
 pub const IFA_F_TEMPORARY: u32 = 0x01;
@@ -2778,6 +2779,10 @@ pub const IFA_F_HOMEADDRESS: u32 = 0x10;
 pub const IFA_F_DEPRECATED: u32 = 0x20;
 pub const IFA_F_TENTATIVE: u32 = 0x40;
 pub const IFA_F_PERMANENT: u32 = 0x80;
+pub const IFA_F_MANAGETEMPADDR: u32 = 0x100;
+pub const IFA_F_NOPREFIXROUTE: u32 = 0x200;
+pub const IFA_F_MCAUTOJOIN: u32 = 0x400;
+pub const IFA_F_STABLE_PRIVACY: u32 = 0x800;
 
 // linux/if_link.h
 pub const IFLA_UNSPEC: c_ushort = 0;