dev-ruby/x25519: fix gemspec generation

Fixes: https://bugs.gentoo.org/694754
Package-Manager: Portage-2.3.69, Repoman-2.3.16
Signed-off-by: Hans de Graaff <graaff@gentoo.org>

dev-ruby/x25519/x25519-1.0.8.ebuild

@@ -24,6 +24,8 @@ IUSE=""
 
 all_ruby_prepare() {
 	sed -i -e '/bundler/ s:^:#: ; /coverall/I s:^:#:' spec/spec_helper.rb || die
+
+	sed -i -e 's/git ls-files -z/find . -print0/' ${RUBY_FAKEGEM_GEMSPEC} || die
 }
 
 each_ruby_configure() {