* bpo-31044: Skip test_posix.test_makedev() on FreeBSD (#2915)
There is a bug in FreeBSD CURRENT with 64-bit dev_t. Skip the test if
dev_t is larger than 32-bit, until the bug is fixed in FreeBSD
CURRENT.
(cherry picked from commit 12953ffe12ac781332b384c36b25d12216b1db62)