Merge "mksh: fix ulimit." am: bc57fc9617 am: 69f93583f3

Original change: https://android-review.googlesource.com/c/platform/external/mksh/+/2585945

Change-Id: Iae27d50d0b8b2e22494704f08342796f44290e6b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>