Resolve "`dev` branch does not compile on ARM x64"

Closes #1429 (closed)

.cargo/config

@@ -9,3 +9,8 @@ uc = "update -p duniter-core"
 ug = "update -p duniter-gva"
 ugc = "update -p duniter-gva-conf"
 xtask = "run --package xtask --"
+
+# ARM x64 specific, otherwise crash (because of rustc bug)
+# see: https://github.com/rust-lang/cargo/issues/6489
+[target.'cfg(all(target_arch = "aarch64"))']
+rustflags = ["-Ccodegen-units=1"]