hack: Rename .ensure-emptyfs to .build-empty-images

Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
(cherry picked from commit a93aadc2e6)
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>

Dockerfile.e2e

@@ -71,8 +71,8 @@ RUN apk --no-cache add \
     tar \
     xz
 
-COPY hack/test/e2e-run.sh       /scripts/run.sh
-COPY hack/make/.ensure-emptyfs  /scripts/ensure-emptyfs.sh
+COPY hack/test/e2e-run.sh           /scripts/run.sh
+COPY hack/make/.build-empty-images  /scripts/build-empty-images.sh
 
 COPY integration/testdata       /tests/integration/testdata
 COPY integration/build/testdata /tests/integration/build/testdata

hack/make/.integration-daemon-setup

@@ -3,5 +3,5 @@ set -e
 
 source "$MAKEDIR/.detect-daemon-osarch"
 if [ "$DOCKER_ENGINE_GOOS" != "windows" ]; then
-	bundle .ensure-emptyfs
+	bundle .build-empty-images
 fi

hack/test/e2e-run.sh

@@ -81,5 +81,5 @@ set_platform_timeout() {
 	fi
 }
 
-sh /scripts/ensure-emptyfs.sh
+sh /scripts/build-empty-images.sh
 run_test_integration