[sgen-binprot] Add gray queue enqueue and dequeue
[sgen-gray-queue] {WIP} Disable HEAVY_STATISTICS by default
[sgen-gray-queue] {WIP} Remove compilation warning if HEAVY_STATISTICS is undefined
[sgen-gray-queue] {WIP} Add gray_queue_(en|de)queue_(bulk|section) counters
[sgen-gray-queue] {WIP} Remove state field on GrayQueueSection
[sgen-gray-queue] {WIP} Allocate section with os aligned memory
[sgen-gray-queue] {WIP}