Update bzip2 to 1.0.8 for linux/osx (#2233)
Update bzip2 to 1.0.8 for linux/osx (#2233)

This update addresses a
[CVE](https://nvd.nist.gov/vuln/detail/CVE-2019-12900)
in the 1.0.6 release of bzip2. Windows requires a prebuilt binary
and will be address in a separate commit.
TileDB-Inc/TileDB,TileDB-Inc/TileDB,TileDB-Inc/TileDB,TileDB-Inc/TileDB