Final fixups for updater

- Wire up platforms to match those of CI.
- Introduce "final" feature to tag version with "nightly".

util/src/misc.rs

@@ -23,6 +23,14 @@ use target_info::Target;
 include!(concat!(env!("OUT_DIR"), "/version.rs"));
 include!(concat!(env!("OUT_DIR"), "/rustc_version.rs"));
 
+#[cfg(feature = "final")]
+const THIS_TRACK: &'static str = "nightly"; 
+// ^^^ should be reset to "stable" or "beta" according to the release branch.
+
+#[cfg(not(feature = "final"))]
+const THIS_TRACK: &'static str = "unstable";
+// ^^^ This gets used when we're not building a final release; should stay as "unstable".
+
 /// Boolean type for clean/dirty status.
 #[derive(PartialEq, Eq, Clone, Copy, Debug)]
 pub enum Filth {
@@ -45,7 +53,7 @@ pub fn version() -> String {
 	let sha3_dash = if sha3.is_empty() { "" } else { "-" };
 	let commit_date = commit_date().replace("-", "");
 	let date_dash = if commit_date.is_empty() { "" } else { "-" };
-	format!("Parity/v{}-unstable{}{}{}{}/{}/rustc{}", env!("CARGO_PKG_VERSION"), sha3_dash, sha3, date_dash, commit_date, platform(), rustc_version())
+	format!("Parity/v{}-{}{}{}{}{}/{}/rustc{}", env!("CARGO_PKG_VERSION"), THIS_TRACK, sha3_dash, sha3, date_dash, commit_date, platform(), rustc_version())
 }
 
 /// Get the standard version data for this software.
@@ -64,5 +72,5 @@ pub fn version_data() -> Bytes {
 
 /// Provide raw information on the package.
 pub fn raw_package_info() -> (&'static str, &'static str, &'static str) {
-	(env!["CARGO_PKG_VERSION_PRE"], env!["CARGO_PKG_VERSION"], sha())
+	(THIS_TRACK, env!["CARGO_PKG_VERSION"], sha())
 }