build: Descend into scripts on coverage-clean rule

Makefile.am

@@ -135,6 +135,7 @@ coverage-clean:
 	rm -rf doc/coverage/
 	find -name '*.gcno' -o -name '*.gcda' -o \
 	     -name '*.gcov' -o -name '*.lcov' | xargs rm -f
+	$(MAKE) -C scripts $@
 else
 coverage:
 	@echo "Need to reconfigure with --enable-coverage"

debian/changelog

@@ -18,6 +18,7 @@ dpkg (1.18.4) UNRELEASED; urgency=low
       to avoid using the system modules. Regression introduced in dpkg 1.17.8.
       Reported by Jérémy Bobbio <lunar@debian.org>. Closes: #801329
     - Use absolute buildir pathnames in PATH variable for the test suite.
+    - Descend into scripts directory when cleaning up code coverage files.
   * Documentation:
     - Move description for “target architecture” from the dpkg-architecture(1)
       ‘-A’ option to the TERMS section. Closes: #799046