gc updated to gc-8.2.12 (related to feature #1268)
[InternetShortcut] URL=https://github.com/bdwgc/bdwgc/releases/download/v8.2.12/gc-8.2.12.tar.gz URL=https://github.com/bdwgc/libatomic_ops/releases/download/v7.10.0/libatomic_ops-7.10.0.tar.gz