Switched from GrowableArray to MallocGrowableArray to fix crash caused by no isolate/thread existin…

runtime/vm/kernel_binary.cc

Index: runtime/vm/kernel_binary.cc
diff --git a/runtime/vm/kernel_binary.cc b/runtime/vm/kernel_binary.cc
index ec71cd838da1887d5715c868118aa40ec8a3ae88..2385306e28bb81e077424c685dbd1cf49ebbdb77 100644
--- a/runtime/vm/kernel_binary.cc
+++ b/runtime/vm/kernel_binary.cc
@@ -191,8 +191,8 @@ class BlockStack {
 
  private:
   int current_count_;
-  GrowableArray<T*> variables_;
-  GrowableArray<int> variable_count_;
+  MallocGrowableArray<T*> variables_;
+  MallocGrowableArray<int> variable_count_;
 };
 
 
@@ -246,8 +246,8 @@ class BlockMap {
  private:
   int current_count_;
   int stack_height_;
-  Map<T, int> variables_;
-  GrowableArray<int> variable_count_;
+  MallocMap<T, int> variables_;
+  MallocGrowableArray<int> variable_count_;
 };