Fix all the imports to run nginx

lib/emscripten/src/time.rs

@@ -99,6 +99,16 @@ pub extern "C" fn _difftime(t0: u32, t1: u32) -> c_int {
     (t0 - t1) as _
 }
 
+pub extern "C" fn _gmtime_r(one: i32, two: i32, ctx: &mut Ctx) -> i32 {
+    debug!("emscripten::_gmtime_r");
+    -1
+}
+
+pub extern "C" fn _mktime(one: i32, ctx: &mut Ctx) -> i32 {
+    debug!("emscripten::_mktime");
+    -1
+}
+
 #[repr(C)]
 struct guest_tm {
     pub tm_sec: c_int,    // 0