8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate(). Reviewed-by: johnc, ysr Contributed-by: tamao <tao.mao@oracle.com>

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README:

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  This file should be located at the top of the hotspot Mercurial repository.

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  See http://openjdk.java.net/ for more information about the OpenJDK.

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  See ../README-builds.html for complete details on build machine requirements.

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Simple Build Instructions:

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    cd make && gnumake

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  The files that will be imported into the jdk build will be in the "build"

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  directory.

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