games/kanatest: fix ports compliance

 - change += into = where appropriate

While the Porter's Handbook wants us to place japanese as the first
category, Poudriere wants games to be the first category.  Given that
an unhappy Poudriere leads to a broken port, this was not changed.

Reported by:	eduardo
Approved by:	portmgr (blanket)
Approved by:	eduardo (mentor)
Differential Revision: https://reviews.freebsd.org/D38632

games/kanatest/Makefile

@@ -10,12 +10,12 @@ LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 FETCH_DEPENDS=	git:devel/git
-LIB_DEPENDS+=	libharfbuzz.so:print/harfbuzz
+LIB_DEPENDS=	libharfbuzz.so:print/harfbuzz
 
 USES=		gettext gmake gnome pkgconfig tar:xz
-USE_GNOME+=	atk cairo gdkpixbuf2 glib20 gtk30 libxml2 pango
+USE_GNOME=	atk cairo gdkpixbuf2 glib20 gtk30 libxml2 pango
 GNU_CONFIGURE=	yes
-MAKE_ENV+=	LIBINTL="-lintl"
+MAKE_ENV=	LIBINTL="-lintl"
 
 OPTIONS_DEFINE=	NLS
 OPTIONS_SUB=	yes