Auto merge of #2441 - tklauser:apple-rtf-consts, r=JohnTitor

Add Apple RTF_DEAD and RTF_GLOBAL

RTF_DEAD was added in macOS 10.13.
RTF_GLOBAL was added in macOS 11.0.

Author: bors

libc-test/build.rs

@@ -297,6 +297,8 @@ fn test_apple(target: &str) {
             "SF_SETTABLE" => true,
             // FIXME: the values have been changed since Big Sur
             "HW_TARGET" | "HW_PRODUCT" | "HW_MAXID" => true,
+            // this const requires macOS 11.0 or higher
+            "RTF_GLOBAL" => true,
             _ => false,
         }
     });

libc-test/semver/apple.txt

@@ -1043,10 +1043,12 @@ RTF_BLACKHOLE
 RTF_BROADCAST
 RTF_CLONING
 RTF_CONDEMNED
+RTF_DEAD
 RTF_DELCLONE
 RTF_DONE
 RTF_DYNAMIC
 RTF_GATEWAY
+RTF_GLOBAL
 RTF_HOST
 RTF_IFREF
 RTF_IFSCOPE

src/unix/bsd/apple/mod.rs

@@ -4229,6 +4229,8 @@ pub const RTF_CONDEMNED: ::c_int = 0x2000000;
 pub const RTF_IFREF: ::c_int = 0x4000000;
 pub const RTF_PROXY: ::c_int = 0x8000000;
 pub const RTF_ROUTER: ::c_int = 0x10000000;
+pub const RTF_DEAD: ::c_int = 0x20000000;
+pub const RTF_GLOBAL: ::c_int = 0x40000000;
 
 pub const RTM_VERSION: ::c_int = 5;