7182260: G1: Fine grain RSet freeing bottleneck Summary: Chain the fine grain PerRegionTables in an individual RSet together and free them in bulk using a single operation. Reviewed-by: johnc, brutisso Contributed-by: Thomas Schatzl <thomas.schatzl@jku.at>

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; This .DEF file is a placeholder for one which is automatically
; generated during the build process. See
; make\windows\build_vm_def.sh and
; make\windows\makefiles\projectcreator.make (esp. the "-prelink"
; options).
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