Skip on more platforms

Author: tgross35

ci/run.sh

@@ -85,7 +85,9 @@ cmd="cargo test --target $target ${LIBC_CI_ZBUILD_STD+"-Zbuild-std"}"
 # Run tests in the `libc` crate
 case "$target" in
     # FIXME(android): unit tests fail to start on Android
+    # FIXME(s390x): unit tests fail to locate glibc
     *android*) ;;
+    *s390x*) ;;
     *) $cmd
 esac