Rename snapshot kind enum values kAppWithJIT -> kAppJIT, kAppNoJIT -> kAppAOT.

runtime/vm/precompiler.cc

Index: runtime/vm/precompiler.cc
diff --git a/runtime/vm/precompiler.cc b/runtime/vm/precompiler.cc
index b487504748c2e2436d7610608154a271366764f8..e2eb627d851bc1181963771fa1b785313261bdb7 100644
--- a/runtime/vm/precompiler.cc
+++ b/runtime/vm/precompiler.cc
@@ -1103,7 +1103,7 @@ void Precompiler::AddField(const Field& field) {
         if (FLAG_trace_precompiler) {
           THR_Print("Precompiling initializer for %s\n", field.ToCString());
         }
-        ASSERT(Dart::snapshot_kind() != Snapshot::kAppNoJIT);
+        ASSERT(Dart::snapshot_kind() != Snapshot::kAppAOT);
         const Function& initializer = Function::Handle(
             Z, CompileStaticInitializer(field, /* compute_type = */ true));
         ASSERT(!initializer.IsNull());