Noting that I'm successfully running Go 1.2 binaries with CGO on android/arm, cross-compiled from darwin/amd64 (my macbook).

You can check out the Makefiles in libtorrent-go[1] and torrent2http[2]

[1] https://github.com/steeve/libtorrent-go

[2] https://github.com/steeve/torrent2http