mkarchroot: Add more locales

These are the ones required to pass the tests for geocode-glib.

mkarchroot.in

@@ -84,7 +84,8 @@ done
 unshare --mount pacstrap -${umode}Mcd ${pac_conf:+-C "$pac_conf"} "$working_dir" \
 	"${cache_dirs[@]/#/--cachedir=}" "$@" || die 'Failed to install all packages'
 
-printf '%s.UTF-8 UTF-8\n' C en_US de_DE > "$working_dir/etc/locale.gen"
+printf '%s.UTF-8 UTF-8\n' C en_US de_DE en_GB fr_FR cs_CZ sv_SE \
+	> "$working_dir/etc/locale.gen"
 echo 'LANG=C.UTF-8' > "$working_dir/etc/locale.conf"
 echo "$CHROOT_VERSION" > "$working_dir/.arch-chroot"