Define a flag --future to enable the most probable future shipping config

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 6c9afb2e0cee20e28940daf24695b9b48c2c6b3b..cf63f338028126ddcf2af6e921a67005ce3c5758 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -248,6 +248,11 @@ HARMONY_STAGED(FLAG_STAGED_FEATURES)
 HARMONY_SHIPPING(FLAG_SHIPPING_FEATURES)
 #undef FLAG_SHIPPING_FEATURES
 
+DEFINE_BOOL(future, false,
+            "Implies all staged features that we want to ship in the "
+            "not-too-far future")
+DEFINE_IMPLICATION(future, ignition_staging)
+
 // Flags for experimental implementation features.
 DEFINE_BOOL(allocation_site_pretenuring, true,
             "pretenure with allocation sites")