build: sync dolt with upstream
diff --git a/Makefile.am b/Makefile.am
index caf18b6..9457655 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,6 +7,7 @@
 DISTCLEAN_LOCAL_HOOKS =
 EXTRA_DIST =
 CLEANFILES = $(BUILT_FILES)
+DISTCLEANFILES =
 BUILT_FILES =
 ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
 AM_MAKEFLAGS = --no-print-directory
@@ -381,6 +382,8 @@
 buildtest-TESTS:
 	$(MAKE) $(AM_MAKEFLAGS) $(check_LTLIBRARIES) $(check_PROGRAMS)
 
+DISTCLEANFILES += $(DOLT_CLEANFILES)
+
 # ------------------------------------------------------------------------------
 # coverage
 # ------------------------------------------------------------------------------