message: [docker] Use thin LTO for release artifacts
  Closes:
  Approved by: andll
diff: @@ -12,7 +12,7 @@ export RUSTFLAGS="-Ctarget-cpu=skylake -Ctarget-feature=+aes,+sse2,+sse4.1,+ssse
  export RUST_NIGHTLY=$(cat cargo-toolchain)
  export CARGO=$(rustup which --toolchain $RUST_NIGHTLY cargo)
  export CARGOFLAGS=$(cat cargo-flags)
  -export CARGO_PROFILE_RELEASE_LTO=true # override lto setting to turn on fully for release builds
  +export CARGO_PROFILE_RELEASE_LTO=thin # override lto setting to turn on thin-LTO for release builds
  ${CARGO} ${CARGOFLAGS} build --release -p libra-genesis-tool -p libra-node -p cli -p config-builder -p libra-key-manager -p safety-rules -p db-bootstrapper -p backup-cli -p cluster-test "$@"
  