Merge "Upgrade mksh to mksh-R59c" am: 6d742e9115 am: b3138b6b4f am: 958fc64917 am: 71a7c1787d am: a390932b46

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

Change-Id: I651b3a44e86ee8bedb73173c8de292f8e3977291
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>