Enable FORTIFY_SOURCE for 32-bit Android binaries

See merge request !37

-D_FORTIFY_SOURCE=2 has no effect with the API 16 compiler,
which resulted in our 32-bit binaries not having those
protections.

Add Tor 0.4.8.9

See merge request !36

Add Tor 0.4.7.15

See merge request !35

Add tor-0.4.7.14

Closes #16

See merge request !33

Use tor-0.4.7.14 in upstream buildsystem

See merge request !34

Use our own tbb branch and tag for that.

Fix problem with different values of BUILD_DIR in create_sources_jar()

See merge request !32

Fix syntax error in import

See merge request !31

Don't clobber built jar when downloading reference jar

See merge request !29

Use create_sources_jar() from utils.py for macOS

See merge request !30

Use tag instead of seemingly random commit for upstream build repo

See merge request !28

macOS artifacts

See merge request !27

Upgrade OpenSSL to 1.1.1t

See merge request !26

Simplify the way we zip binaries

See merge request !23