liby: Move to toolchain package

We don't need an entire package for this trivial library.  Move it to
toolchain, which in practice means it's installed in toolchain-dev as
it only contains a static library.

MFC after:	1 day
Reviewed by:	bapt
Sponsored by:	https://www.patreon.com/bsdivy
Differential Revision:	https://reviews.freebsd.org/D52793

lib/liby/Makefile

@@ -1,4 +1,4 @@
-PACKAGE=lib${LIB}
+PACKAGE=toolchain
 LIB=	y
 SRCS=	main.c yyerror.c
 NO_PIC=

release/packages/ucl/liby-all.ucl

@@ -1,28 +0,0 @@
-/*
- * SPDX-License-Identifier: ISC
- *
- * Copyright (c) 2025 Lexi Winter <ivy@FreeBSD.org>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-comment = "YACC runtime library"
-
-desc = <<EOD
-liby provides default implementations of main() and yyerror() for applications
-which use the yacc(1) parser generator.
-EOD
-
-annotations {
-	set = "optional,optional-jail"
-}