makechrootpkg: when installing with -I, ensure package is installed

noconfirm is wrong here, as we don't want to accept the default answer
-- we want to install the new package, even if it conflicts and provides
an existing one. After all, we explicitly asked for it.

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Levente Polyak <anthraxx@archlinux.org>

makechrootpkg.in

@@ -161,7 +161,7 @@ install_packages() {
 
 	cp -- "${install_pkgs[@]}" "$copydir/root/"
 	arch-nspawn "$copydir" "${bindmounts_ro[@]}" "${bindmounts_rw[@]}" \
-		pacman -U --noconfirm -- "${pkgnames[@]/#//root/}"
+		bash -c 'yes y | pacman -U -- "$@"' -bash "${pkgnames[@]/#//root/}"
 	ret=$?
 	rm -- "${pkgnames[@]/#/$copydir/root/}"