Put BacktraceOffline code into a separate library.

BacktraceOffline is the only code that uses libLLVM. Create
a new shared library, backtrace_offline.so, that references this
so that including libbacktrace.so doesn't wind up pulling in libLLVM.

Change-Id: I90c502d833f6c464c3810dffde52a0c6da241cce
3 files changed
tree: 28049b0af51b5599ee96ab8345a0a7a209b324f2
  1. libbacktrace/