Merge "libbacktrace: only build libbacktrace_offline static library."
am: f20e4b1

* commit 'f20e4b1b710d01fca7bfc41739058ef22c44e0f3':
  libbacktrace: only build libbacktrace_offline static library.

Change-Id: I6e00010154f97deefb9bcb9901b807e833eab9fb