delete generated rpm "changelog"

The generated "changelog" was not removed
before re-generating, causing the changelog
to be added twice on repeated runs of "make rpm"
(when bind-mounting the local source).

As a result, rpms failed to build, because
the resulting file had entries in non-chronological
order.

This change removes the generated file
before re-generating, and adds the file
to .gitignore, to prevent it from
accidentally being added to source control.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

.gitignore

@@ -16,6 +16,7 @@ autogen/
 bundles/
 cmd/dockerd/dockerd
 cmd/docker/docker
+contrib/builder/rpm/*/changelog
 dockerversion/version_autogen.go
 dockerversion/version_autogen_unix.go
 docs/AWS_S3_BUCKET

hack/make/build-rpm

@@ -54,6 +54,7 @@ set -e
 	make manpages
 
 	# Convert the CHANGELOG.md file into RPM changelog format
+	rm -f contrib/builder/rpm/${PACKAGE_ARCH}/changelog
 	VERSION_REGEX="^\W\W (.*) \((.*)\)$"
 	ENTRY_REGEX="^[-+*] (.*)$"
 	while read -r line || [[ -n "$line" ]]; do