add build with features in gitlab

.gitlab-ci.yml

@@ -399,6 +399,11 @@ examples-contract-build:
     - cargo contract -V
     - for example in integration-tests/*/; do
         if [ "$example" = "integration-tests/lang-err-integration-tests/" ]; then continue; fi;
+        if [ "$example" = "integration-tests/conditional-compilation/" ];
+        then pushd $example &&
+        cargo +stable contract build --features foo &&
+        popd;
+        fi;
         pushd $example &&
         cargo +stable contract build &&
         popd;
@@ -420,7 +425,7 @@ examples-no-std-check:
     - rustup component add rust-src --toolchain stable
     - cargo contract -V
     # We skip some examples for those reasons:
-    # There are no manifests in those two directories and hence it would fall back to the workspace. 
+    # There are no manifests in those two directories and hence it would fall back to the workspace.
     #  - lang-err-integration-tests
     #  - upgradeable-contracts
     # This uses dlmalloc which is only supported on select targets.