Merge "pppd: fix ip-up-vpn path" am: 6e26ec0129

Original change: https://android-review.googlesource.com/c/platform/external/ppp/+/2627090

Change-Id: I53d64285e78642f779c7fa0dc08ead4d564467e0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>