Add doc for symbolizing crash dumps.
Add doc for symbolizing crash dumps.

This doc describes how to get symbols, file, and line numbers from
a stack trace from an optimized release build without debug symbols.
This doc is generic enough to apply to other projects too.

Change-Id: I3513f7d78b36ba96bacfffa52558fc794698261c

shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded