pkgbase: Create a FreeBSD-fetch package

It's useful for small image to fetch some data but we don't want to
install utilities nor bloat runtime.

MFC after:	2 weeks
Sponsored by:	Beckhoff Automation GmbH & Co. KG
Differential Revision:	https://reviews.freebsd.org/D33463

(cherry picked from commit 13ef8134ef)

lib/libfetch/Makefile

@@ -2,6 +2,8 @@
 
 .include <src.opts.mk>
 
+PACKAGE=	fetch
+
 LIB=		fetch
 CFLAGS+=	-I.
 SRCS=		fetch.c common.c ftp.c http.c file.c \

release/packages/Makefile.package

@@ -44,6 +44,8 @@ ee_COMMENT= 		Easy Editor Utilities
 ee_DESC= 		Easy Editor Utilities
 efi-tools_COMMENT=	UEFI Utilities
 efi-tools_DESC=		UEFI Utilities
+fetch_COMMENT=		Fetch Utility
+fetch_DESC=		Fetch Utility
 ftp_COMMENT=		FTP Utilities
 ftp_DESC=		FTP Utilities
 ftpd_COMMENT=		FTP Daemon

usr.bin/fetch/Makefile

@@ -1,5 +1,6 @@
 # $FreeBSD$
 
+PACKAGE=	fetch
 PROG=		fetch
 LIBADD=		fetch