The any() builtin was introduced in Python 2.5. Not only is its intent
clearer, but it handles the case of zero items -- which the reduce(or_)
construct does not. Sporadically we've seen exceptions from
generate_breakpad_symbols.py when reduce(or_, ...) is given zero items. This
masks the actual error (failure to dump symbols? failure to read them?),
masquerading as a bug in the Python script.

Update script that generates Google Breakpad symbols to look in tghe right place first and default to the original location if not found.

so the failure in copy_l_viewer_manifest (fixed in changeset 4ae8723c7d33) won't be so silent in the future.

WIP VPLAT-248 - added a generate_breakpad_symbols target to the build and info to upload symbol files to s3 after the build.