improve orca target

core/fmt/fmt_os.odin

@@ -1,5 +1,6 @@
 //+build !freestanding
 //+build !js
+//+build !orca
 package fmt
 
 import "base:runtime"

core/time/time_orca.odin

@@ -0,0 +1,24 @@
+//+private
+//+build orca
+package time
+
+_IS_SUPPORTED :: false
+
+_now :: proc "contextless" () -> Time {
+	return {}
+}
+
+_sleep :: proc "contextless" (d: Duration) {
+}
+
+_tick_now :: proc "contextless" () -> Tick {
+	// mul_div_u64 :: proc "contextless" (val, num, den: i64) -> i64 {
+	// 	q := val / den
+	// 	r := val % den
+	// 	return q * num + r * num / den
+	// }
+	return {}
+}
+
+_yield :: proc "contextless" () {
+}