misc/exercism: Unbreak the port

- Fix LICENSE_FILE to unbreak the port.
- Use DISTVERSION instead of PORTVERSION as suggested by the handbook.
- Move GH_TUPLE out of the USE* section.

Reviewed by:	krion
Approved by:	krion (mentor), maintainer timeout
Differential Revision:	https://reviews.freebsd.org/D17489

misc/exercism/Makefile

@@ -2,21 +2,20 @@
 # $FreeBSD$
 
 PORTNAME=	exercism
-PORTVERSION=	3.0.9
 DISTVERSIONPREFIX=	v
+DISTVERSION=	3.0.9
 CATEGORIES=	misc
 
 MAINTAINER=	swills@FreeBSD.org
 COMMENT=	CLI client for exercism.io
 
 LICENSE=	MIT
-LICENSE_FILE=	LICENSE
-
-BROKEN=		wrong LICENSE_FILE
+LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${LOCALBASE}/bin/go:lang/go
 
 USE_GITHUB=	yes
+
 GH_TUPLE=	\
 		exercism:cli:v${PORTVERSION}:DEFAULT/src/github.com/exercism/cli \
 		armon:consul-api:eb2c6b5:consulapi/src/github.com/armon/consul-api \