release: Sort keys in generate-ucl.lua

When writing out the UCL file containing a package's metadata, metadata
values consisting of key-value pairs were not sorted.  For instance, in
the certctl package we could have either

"deps": {
	"FreeBSD-openssl": {
		...
	},
	"FreeBSD-caroot": {
		...
	},
}

or

"deps": {
	"FreeBSD-caroot": {
		...
	},
	"FreeBSD-openssl": {
		...
	},
}

This breaks reproducibility.

Use the undocumented third parameter to libucl's to_format() to request
recursive sorting of keys.

Reviewed by:	manu, bapt
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D51021

release/packages/generate-ucl.lua

@@ -31,5 +31,5 @@ if not f then
 	os.exit(1)
 end
 local obj = parser:get_object()
-f:write(ucl.to_format(obj, 'ucl'))
+f:write(ucl.to_format(obj, 'ucl', true))
 f:close()