Add missing NOTE_MACHTIME and NOTE_MACH_CONTINUOUS_TIME constants to apple.

(backport <rust-lang#3883>)
(cherry picked from commit b693854)

Author: byteallen

libc-test/semver/apple.txt

@@ -1004,6 +1004,8 @@ NOTE_FORK
 NOTE_LEEWAY
 NOTE_LINK
 NOTE_LOWAT
+NOTE_MACHTIME
+NOTE_MACH_CONTINUOUS_TIME
 NOTE_NONE
 NOTE_NSECONDS
 NOTE_PCTRLMASK

src/unix/bsd/apple/mod.rs

@@ -4522,6 +4522,8 @@ pub const NOTE_ABSOLUTE: u32 = 0x00000008;
 pub const NOTE_LEEWAY: u32 = 0x00000010;
 pub const NOTE_CRITICAL: u32 = 0x00000020;
 pub const NOTE_BACKGROUND: u32 = 0x00000040;
+pub const NOTE_MACH_CONTINUOUS_TIME: u32 = 0x00000080;
+pub const NOTE_MACHTIME: u32 = 0x00000100;
 pub const NOTE_TRACK: u32 = 0x00000001;
 pub const NOTE_TRACKERR: u32 = 0x00000002;
 pub const NOTE_CHILD: u32 = 0x00000004;