Since the EVE renewal, we can target Skylake instead of Broadwell as the...

Since the EVE renewal, we can target Skylake instead of Broadwell as the oldest relevant microarchitecture.

.gitlab-ci.yml

 image: git.ufz.de:4567/ecoepi/sick-bees/builder:latest
 
 before_script:
-  - export RUSTFLAGS="-Ctarget-cpu=broadwell -Crelocation-model=dynamic-no-pic"
+  - export RUSTFLAGS="-Ctarget-cpu=skylake -Crelocation-model=dynamic-no-pic"
   - export CARGO_HOME="$CI_PROJECT_DIR/cargo"
   - cargo sweep -r -s