Use other feature syntax

Author: Azoy

stdlib/public/core/InlineArray.swift

@@ -105,7 +105,7 @@ extension InlineArray where Element: ~Copyable {
   @available(SwiftStdlib 6.2, *)
   @_alwaysEmitIntoClient
   public init<E: Error>(_ body: (Int) throws(E) -> Element) throws(E) {
-#if hasFeature(BuiltinEmplaceTypedThrows)
+#if $BuiltinEmplaceTypedThrows
     self = try Builtin.emplace { (rawPtr) throws(E) -> () in
       let buffer = InlineArray<count, Element>._initializationBuffer(
         start: rawPtr
@@ -153,7 +153,7 @@ extension InlineArray where Element: ~Copyable {
     first: consuming Element,
     next: (borrowing Element) throws(E) -> Element
   ) throws(E) {
-#if hasFeature(BuiltinEmplaceTypedThrows)
+#if $BuiltinEmplaceTypedThrows
     // FIXME: We should be able to mark 'Builtin.emplace' as '@once' or something
     //        to give the compiler enough information to know we will only run
     //        it once so it can consume the capture. For now, we use an optional