Add ios as target os

Author: LMJW

src/sys/resource.rs

@@ -139,6 +139,7 @@ pub fn getrlimit(resource: Resource) -> Result<(Option<rlim_t>, Option<rlim_t>)>
         target_os = "openbsd",
         target_os = "netbsd",
         target_os = "macos",
+        target_os = "ios",
         target_os = "android",
         target_os = "dragonfly",
         target_os = "bitrig",
@@ -196,6 +197,7 @@ pub fn setrlimit(
         target_os = "openbsd",
         target_os = "netbsd",
         target_os = "macos",
+        target_os = "ios",
         target_os = "android",
         target_os = "dragonfly",
         target_os = "bitrig",