Merge "simpleperf: Add comment for the mv command fallback." am: c0766c1cea

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/2507935

Change-Id: Ib6680af78127ff1346be919701b45cf64ed68fa9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>