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This CL adds an argument option to modularization LOC stat
generator script so it can output the result to a specified
file in json format.

Also relocated the script under //tools/android.

Bug: 1146478
Change-Id: I6d24b467e7ac64116461aec7780f6fb9a20da03e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2521982Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: Jinsuk Kim <jinsukkim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825507}