Add getline

src/lib.rs

@@ -227,6 +227,7 @@ extern "C" {
     pub fn fputs(s: *const c_char, stream: *mut FILE) -> c_int;
     pub fn puts(s: *const c_char) -> c_int;
     pub fn ungetc(c: c_int, stream: *mut FILE) -> c_int;
+    pub fn getline (lineptr: *mut *mut c_char, n: *mut size_t, stream: *mut FILE) -> ssize_t;
     pub fn fread(ptr: *mut c_void, size: size_t, nobj: size_t, stream: *mut FILE) -> size_t;
     #[cfg_attr(
         all(target_os = "macos", target_arch = "x86"),