Update the GKL version to 0.8.8 (#1733)
Update the GKL version to 0.8.8 (#1733)

* This version incorporates several years of improvements in upstream libraries and fixes SEGFAULTS and other known crashes.
* Fixes https://github.com/broadinstitute/picard/issues/1383
broadinstitute/picard,broadinstitute/picard,broadinstitute/picard,broadinstitute/picard,broadinstitute/picard