Require asserts for variadics SILGen test

Author: natecook1000

test/SILGen/variadic-generics.swift

@@ -1,4 +1,5 @@
 // RUN: %target-swift-emit-silgen -enable-experimental-feature VariadicGenerics %s | %FileCheck %s
+// REQUIRES: asserts
 
 func receive_simple<T...>(_ args: repeat each T) {}
 func receive_simple_owned<T...>(_ args: repeat __owned each T) {}
@@ -76,4 +77,4 @@ func pack_test0<T...>(args: repeat each T) {
 func pack_test1<T...>(args: repeat each T) {
   receive_simple_owned(repeat each args)
 }
-#endif
+#endif