tools: enable leaptiering for aix/ibmi

Author: abmusse

tools/v8_gypfiles/features.gypi

@@ -88,11 +88,6 @@
         'v8_enable_private_mapping_fork_optimization': 0,
       }],
 
-      ['OS in "aix os400"', {
-        'v8_enable_leaptiering': 0,
-      }, {
-        'v8_enable_leaptiering': 1,
-      }],
     ],
 
     # Variables from BUILD.gn
@@ -242,6 +237,9 @@
     # Sets -DV8_ENABLE_SANDBOX.
     'v8_enable_sandbox%': 0,
 
+    # Enable leaptiering
+    'v8_enable_leaptiering%': 1,
+
     # Enable support for external code range relative to the pointer compression
     # cage.
     # Sets -DV8_EXTERNAL_CODE_SPACE.