add missing "ios" to "macos" compilation cases

Author: kevinwern

src/time.rs

@@ -19,7 +19,7 @@ libc_enum! {
                 target_os = "illumos",
                 all(target_env = "newlib", target_arch = "arm"),
                ), repr(i32))]
-    #[cfg_attr(target_os = "macos", repr(u32))]
+    #[cfg_attr(any(target_os = "macos", target_os = "ios"), repr(u32))]
     #[cfg_attr(any(
                 target_os = "hermit",
                 all(target_env = "newlib", target_arch = "aarch64"),
@@ -138,6 +138,7 @@ pub fn clock_gettime(clk_id: ClockId) -> Result<TimeSpec> {
 #[cfg(not(
         any(
             target_os = "macos",
+            target_os = "ios",
             target_os = "redox",
             target_os = "hermit",
         )