dex2oat: add --updatable-bcp-packages-file argument.

Add a command line argument specifying a file that contains
the list of updatable boot class path packages.

Test: Updated module_exclusion_test
Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Test: aosp_taimen-userdebug boots.
Bug: 151314205
Change-Id: Ic6a66ad7e565a9b9b344cc467cb1ed550ab41b3f
diff --git a/runtime/class_linker.h b/runtime/class_linker.h
index 998f739..4731203 100644
--- a/runtime/class_linker.h
+++ b/runtime/class_linker.h
@@ -829,6 +829,8 @@
     return true;
   }
 
+  virtual bool IsUpdatableBootClassPathDescriptor(const char* descriptor);
+
  private:
   class LinkInterfaceMethodsHelper;
   class VisiblyInitializedCallback;