Provide stand-alone snowflake proxy for 32-bit
I tried [[doc/Snowflake#Option2standalone]] and ran into
~/go/src/git.torproject.org/pluggable-transports/snowflake/proxy-go$ torsocks go get
# github.com/keroserene/go-webrtc
/usr/bin/ld: cannot find -lwebrtc-linux-386-magic
collect2: error: ld returned 1 exit status