Merge "Add .gitignore file" into main am: 05b94cab5c am: 6fa16665ba

Original change: https://android-review.googlesource.com/c/platform/external/libcap-ng/+/3199311

Change-Id: Ic063e58c7977b4d50c0143b35c4e7af1ad818bca
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>