Move jsmn to the janitors. am: d367db2317 am: c9a611585b

Original change: https://android-review.googlesource.com/c/platform/external/jsmn/+/3092881

Change-Id: Ia33e206004015541500ae4343b620947d94c3b96
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>