[ci] build: add lin64 archlinux package

Closes #169 (closed)

bin/dunitrust-server/Cargo.toml

@@ -51,4 +51,7 @@ assets = [
     ["../../target/armv7-unknown-linux-gnueabihf/release/dunitrust", "usr/bin/", "755"],
     ["../../images/duniter-rs.png", "usr/share/dunitrust/", "644"],
 ]
-features = ["ssl"]
\ No newline at end of file
+features = ["ssl"]
+
+[package.metadata.arch]
+arch = ["x86_64"]
\ No newline at end of file