[jsoncpp] Add fuzzer.

Bug: 950091
Change-Id: I84a42cb4d4fbc853e8eb3889b85f7b6fbecbb10d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1598236
Auto-Submit: Jonathan Metzman <metzman@chromium.org>
Reviewed-by: Sam Clegg <sbc@chromium.org>
Commit-Queue: Jonathan Metzman <metzman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658229}
2 files changed