Merge "Allow comparing $(wildcard) results to non-empty values" am: 1a3e5eff

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2075735



Change-Id: I10f1ed3fc07de5ca14640a877801107a2cb9184b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>