FindAbseil.cmake: cross-platform library names (#1348)
FindAbseil.cmake: cross-platform library names (#1348)

Fixes #1347
wohe/cartographer,wohe/cartographer,damonkohler/cartographer,damonkohler/cartographer,cartographer-project/cartographer,larics/cartographer,damonkohler/cartographer,larics/cartographer,wohe/cartographer,googlecartographer/cartographer,damonkohler/cartographer,larics/cartographer,cartographer-project/cartographer,cartographer-project/cartographer,wohe/cartographer,googlecartographer/cartographer,cartographer-project/cartographer,larics/cartographer,googlecartographer/cartographer,googlecartographer/cartographer