Use llvm symbolizer for stack script. llvm symbolizer is a more efficient symbolizer than addr2line, objdump, etc. In this cl, I 1)created a wrapper instance to interact with llvm symbolizer, 2)made the stack script to use llvm symbolizer instance, and then 3)added llvm symbolizer into isolated inputs. Bug: 774267 Change-Id: I971fb808b97f3a569eb9615f99efa41e3a56f3cb Reviewed-on: https://chromium-review.googlesource.com/789376 Reviewed-by: agrieve <agrieve@chromium.org> Reviewed-by: Dirk Pranke <dpranke@chromium.org> Commit-Queue: Zhiling Huang <hzl@chromium.org> Cr-Original-Commit-Position: refs/heads/master@{#521820} Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src Cr-Mirrored-Commit: b6e038a7a7b07f680eba6d6ec1c32319ae89cd781 file changed
