8290704: x86: TemplateTable::_new should not call eden_allocate() without contiguous allocs enabled

Reviewed-by: kvn, thartmann, coleenp

src/hotspot/cpu/x86/templateTable_x86.cpp

@@ -3981,7 +3981,7 @@ void TemplateTable::_new() {
       // initialize both the header and fields
       __ jmp(initialize_object);
     }
-  } else {
+  } else if (allow_shared_alloc) {
     // Allocation in the shared Eden, if allowed.
     //
     // rdx: instance size in bytes