Add fake release test build and test runs on CircleCI.

.circleci/config.yml

@@ -22,7 +22,7 @@ defaults:
       name: Build
       command: |
         set -ex
-        if [ "$CIRCLE_BRANCH" = release -o -n "$CIRCLE_TAG" ]; then echo -n > prerelease.txt; else date -u +"nightly.%Y.%-m.%-d" > prerelease.txt; fi
+        if [ "$CIRCLE_BRANCH" = release -o -n "$CIRCLE_TAG" -o -n "$FORCE_RELEASE" ]; then echo -n > prerelease.txt; else date -u +"nightly.%Y.%-m.%-d" > prerelease.txt; fi
         echo -n "$CIRCLE_SHA1" > commit_hash.txt
         mkdir -p build
         cd build
@@ -151,6 +151,11 @@ defaults:
       requires:
         - b_ubu
 
+  - workflow_ubuntu1904_release: &workflow_ubuntu1904_release
+      <<: *workflow_trigger_on_tags
+      requires:
+        - b_ubu_release
+
   - workflow_ubuntu1904_codecov: &workflow_ubuntu1904_codecov
       <<: *workflow_trigger_on_tags
       requires:
@@ -284,6 +289,11 @@ jobs:
       - store_artifacts: *artifacts_solc
       - persist_to_workspace: *artifacts_executables
 
+  b_ubu_release: &build_ubuntu1904_release
+    <<: *build_ubuntu1904
+    environment:
+      FORCE_RELEASE: ON
+
   b_ubu18: &build_ubuntu1804
     docker:
       - image: ethereum/solidity-buildpack-deps:ubuntu1804
@@ -485,6 +495,9 @@ jobs:
   t_ubu_soltest: &t_ubu_soltest
     <<: *test_ubuntu1904
 
+  t_ubu_release_soltest: &t_ubu_release_soltest
+    <<: *t_ubu_soltest
+
   t_ubu_cli: &t_ubu_cli
     docker:
       - image: ethereum/solidity-buildpack-deps:ubuntu1904
@@ -498,6 +511,9 @@ jobs:
       - store_test_results: *store_test_results
       - store_artifacts: *artifacts_test_results
 
+  t_ubu_release_cli: &t_ubu_release_cli
+    <<: *t_ubu_cli
+
   t_ubu_asan_cli:
     <<: *t_ubu_cli
     environment:
@@ -617,6 +633,11 @@ workflows:
       - t_ubu_cli: *workflow_ubuntu1904
       - t_ubu_soltest: *workflow_ubuntu1904
 
+      # Ubuntu fake release build and tests
+      - b_ubu_release: *workflow_trigger_on_tags
+      - t_ubu_release_cli: *workflow_ubuntu1904_release
+      - t_ubu_release_soltest: *workflow_ubuntu1904_release
+
       # ASan build and tests
       - b_ubu_asan: *workflow_trigger_on_tags
       - t_ubu_asan_constantinople: *workflow_ubuntu1904_asan