Merge "Upgrade mksh to mksh-R59c" am: 6d742e9115 am: b3138b6b4f

Original change: https://android-review.googlesource.com/c/platform/external/mksh/+/2517224

Change-Id: I8799dd924d3272e71c7635d7ac499b1b8b1cfd12
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>