lldb 3.8 workaround for live hangs

[brendangregg]

#92 tracks documenting the problem, but... maybe there's a workaround for this that we can use for lldb 3.8? Just wanted to post this as an issue in case someone figures it out. I don't know how far away it will be for lldb 4.0 to be widely available.

[rnchamberlain]

http://apt.llvm.org/ says "...stable, qualification and development branches (currently 3.9, 4.0 and 5.0)...". Might be worth seeing if the fix could be back-ported to 3.9?