re-enable make validate on CI

.gitlab-ci.yml

@@ -8,9 +8,9 @@ iris-coq8.5.3:
   - . build/opam-ci.sh 'coq 8.5.3' 'coq-mathcomp-ssreflect 1.6'
   # build
   - 'time make -j8 TIMED=y 2>&1 | tee build-log.txt'
-  - 'fgrep Axiom build-log.txt && exit 1'
-  - 'cat build-log.txt  | egrep "[a-zA-Z0-9_/-]+ \(user: [0-9]" | tee build-time.txt'
-  #- make validate
+  - 'if fgrep Axiom build-log-full.txt >/dev/null then; exit 1; fi'
+  - 'cat build-log.txt | egrep "[a-zA-Z0-9_/-]+ \(user: [0-9]" | tee build-time.txt'
+  - make validate
   cache:
     key: "coq8.5.3"
     paths: