games-action/descent2-vertigo: fix NonConsistentTarUsage [QA]

Issue: https://github.com/pkgcore/pkgcheck/issues/704
Signed-off-by: Arthur Zamarin <arthurzam@gentoo.org>

games-action/descent2-vertigo/descent2-vertigo-1.0-r1.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2024 Gentoo Authors
+# Copyright 1999-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -30,7 +30,7 @@ src_unpack() {
 	# *.{hog,mn2} into data/missions
 	# Remainder into data
 
-	tar c \
+	tar -c -f - \
 		--mode=u+w \
 		--ignore-case \
 		--xform='s:.*/::xg' \
@@ -39,7 +39,7 @@ src_unpack() {
 		--xform='s:^[^/]+$:data/\0:x' \
 		--exclude="$(use videos || echo '*.mvl')" \
 		**/{hoard.ham,d2x-h.mvl,{d2x,panic}.{hog,mn2}}* \
-		| tar x -C "${WORKDIR}"
+		| tar -x -f - -C "${WORKDIR}"
 
 	assert "tar failed"
 	eshopts_pop