Upgrade libtracefs to libtracefs-1.6.4 am: eee6e409c7

Original change: https://android-review.googlesource.com/c/platform/external/libtracefs/+/2394014

Change-Id: If495992688f3494c1034fb0b49f42266e1709019
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>