[1704] Use CLEANFILES instead of clean-local

Makefile.am

@@ -406,5 +406,4 @@ EXTRA_DIST += ext/coroutine/coroutine.h
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = dns++.pc
 
-clean-local:
-	-rm -f $(abs_top_builddir)/logger_lockfile
+CLEANFILES = $(abs_top_builddir)/logger_lockfile