games-action/multimc: fix build with clang (-Werror)

Package-Manager: Portage-3.0.13, Repoman-3.0.2
Signed-off-by: Theo Anderson <telans@posteo.de>

games-action/multimc/multimc-0.6.11.ebuild

@@ -1,4 +1,4 @@
-# Copyright 2019-2020 Gentoo Authors
+# Copyright 2019-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -53,6 +53,11 @@ src_unpack() {
 	mv "${WORKDIR}/quazip-${QUAZIP_VER}" "${S}/libraries/quazip" || die
 }
 
+src_prepare() {
+	cmake_src_prepare
+	sed -r -i 's/-Werror([a-z=-]+)?//g' CMakeLists.txt || die
+}
+
 src_configure() {
 	local mycmakeargs=(
 		-DMultiMC_LAYOUT=lin-system