TIMESTAMP = 1556098534
SHA256 (libpng-1.6.37.tar.xz) = 505e70834d35383537b6491e7ae8641f1a4bed1876dbfe361201fc80868d88ca
SIZE (libpng-1.6.37.tar.xz) = 1012272
SHA256 (libpng-1.6.37-apng.patch.gz) = 10d9e0cb60e2b387a79b355eb7527c0bee2ed8cbd12cf04417cabc4d6976683c
SIZE (libpng-1.6.37-apng.patch.gz) = 10334