[master] define dbutil_test.sh as noinst_SCRIPTS to auto-regenerate on modify.

this will prevent surprising test failure on an incrementally updated dev
tree.  okayed on jabber.

src/bin/dbutil/tests/Makefile.am

@@ -2,6 +2,8 @@ SUBDIRS = . testdata
 
 # Tests of the update script.
 
+noinst_SCRIPTS = dbutil_test.sh
+
 check-local:
 	B10_LOCKFILE_DIR_FROM_BUILD=$(abs_top_builddir) \
 	$(SHELL) $(abs_builddir)/dbutil_test.sh