Merge branch 'merge_nulld_zerod' into 'master'

Merge nulld and zerod.

See merge request !319

recipes/core/initfs/recipe.toml

@@ -7,7 +7,6 @@ dependencies = [
   "drivers-initfs",
   "init",
   "logd",
-  "nulld",
   "ramfs",
   "randd",
   "redoxfs",

recipes/core/nulld/recipe.toml

-[source]
-git = "https://gitlab.redox-os.org/redox-os/nulld.git"
-
-[build]
-template = "cargo"

recipes/core/zerod/recipe.toml

@@ -2,4 +2,12 @@
 git = "https://gitlab.redox-os.org/redox-os/zerod.git"
 
 [build]
-template = "cargo"
+template = "custom"
+script = """
+cookbook_cargo --bin zerod
+
+# TODO: symlinks aren't supported by redox-initfs
+#ln -sv zerod "${COOKBOOK_STAGE}/bin/nulld"
+
+cp "${COOKBOOK_STAGE}/bin/zerod" "${COOKBOOK_STAGE}/bin/nulld"
+"""