media-fonts/fgdc-emergency: use BDEPEND for app-arch/unzip

Package-Manager: Portage-3.0.14-prefix, Repoman-3.0.2
Signed-off-by: Sam James <sam@gentoo.org>

media-fonts/fgdc-emergency/fgdc-emergency-2.20.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -12,10 +12,8 @@ SRC_URI="http://www.fgdc.gov/HSWG/symbol_downloads/ers_v${PV//./}.zip"
 LICENSE="public-domain"
 SLOT="0"
 KEYWORDS="amd64 x86"
-IUSE=""
 
-DEPEND="app-arch/unzip"
-RDEPEND=""
+BDEPEND="app-arch/unzip"
 
 S="${WORKDIR}/ersSymbolsVersion0202"
 FONT_S="${S}"