[PKGBUILD] Try to fix an issue where if prepare() fails then the …

…buid

would continue anyway.

build-recipe-arch

@@ -41,7 +41,7 @@ recipe_setup_arch() {
 
 recipe_prepare_arch() {
     echo "Preparing sources..."
-    _arch_recipe_makepkg -so "2>&1" ">/dev/null"
+    _arch_recipe_makepkg -so "2>&1" ">/dev/null" || exit 1
 }
 
 recipe_build_arch() {