build: Include Mesh JSON files unconditionally in EXTRA_DIST

We always want the JSON files to be part of the generated tarball, and
not just when --enable-mesh has been given.
diff --git a/Makefile.tools b/Makefile.tools
index c2d81a8..f7ab77d 100644
--- a/Makefile.tools
+++ b/Makefile.tools
@@ -32,9 +32,9 @@
 mesh_meshctl_LDADD = gdbus/libgdbus-internal.la src/libshared-glib.la \
 				lib/libbluetooth-internal.la \
 				@GLIB_LIBS@ @DBUS_LIBS@ -ljson-c -lreadline
+endif
 
 EXTRA_DIST += mesh/local_node.json mesh/prov_db.json
-endif
 
 if MONITOR
 bin_PROGRAMS += monitor/btmon