lxqt-sudo: fix cross

srcpkgs/lxqt-sudo/template

@@ -4,7 +4,7 @@ version=0.11.1
 revision=1
 build_style=cmake
 configure_args="-DPULL_TRANSLATIONS=0"
-hostmakedepends="pkg-config"
+hostmakedepends="pkg-config qt5-host-tools liblxqt-devel"
 makedepends="liblxqt-devel"
 depends="sudo"
 short_desc="LXQt GUI frontend for sudo"
@@ -13,3 +13,7 @@ license="LGPL-2.1"
 homepage="http://lxqt.org/"
 distfiles="https://github.com/lxde/lxqt-sudo/releases/download/${version}/lxqt-sudo-${version}.tar.xz"
 checksum=a902b32e137f5041c1dc82376742160f4c866d5a8da25c9384431512cf8555da
+
+post_configure() {
+	find -name flags.make -exec sed -i "{}" -e"s;-isystem;-I;g" \;
+}