Make Your Rust Binaries Tiny

On my toy project https://github.com/Orange-OpenSource/hurl, binary size went from 5.7M to 3.2M without any noticeable perf drops.

  [profile.release]
  lto = true          # Enable Link Time Optimization
  codegen-units = 1   # Reduce number of codegen units to increase optimizations.
  panic = "abort"     # Abort on panic
  strip = true        # Automatically strip symbols from the binary.