Merge pull request #9225 from infosiftr/bzip

Add bzip2 for diff-pr.sh

Dockerfile

@@ -11,6 +11,8 @@ RUN set -eux; \
 		git \
 # gawk for diff-pr.sh
 		gawk \
+# tar -tf in diff-pr.sh
+		bzip2 \
 	; \
 	rm -rf /var/lib/apt/lists/*