6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
Summary: G1 now answers "no" to the query can_elide_initializing_store_barrier() in the product build. A debug flag allows alternate behaviour in debug builds.
Reviewed-by: iveresov, tonyp
README:
This file should be located at the top of the corba Mercurial repository.
See http://openjdk.java.net/ for more information about the OpenJDK.
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