Fixes bug caused by changes array

lib/gitlab/ci/build/rules/rule/clause/changes.rb

@@ -33,7 +33,11 @@ def expand_globs(context)
 
         def paths
           strong_memoize(:paths) do
-            Array(@globs[:paths])
+            if @globs.is_a?(Array)
+              @globs
+            else
+              Array(@globs[:paths])
+            end
           end
         end
       end

spec/lib/gitlab/ci/build/rules/rule/clause/changes_spec.rb

@@ -18,9 +18,11 @@
 
       # rubocop:disable Layout/LineLength
       where(:case_name, :globs, :files, :satisfied) do
+        'exact top-level match'      |  ['Dockerfile']                         | { 'Dockerfile' => '', 'Gemfile' => '' }            | true
         'exact top-level match'      | { paths: ['Dockerfile'] }               | { 'Dockerfile' => '', 'Gemfile' => '' }            | true
         'exact top-level no match'   | { paths: ['Dockerfile'] }               | { 'Gemfile' => '' }                                | false
         'pattern top-level match'    | { paths: ['Docker*'] }                  | { 'Dockerfile' => '', 'Gemfile' => '' }            | true
+        'pattern top-level no match' | ['Docker*']                             | { 'Gemfile' => '' }                                | false
         'pattern top-level no match' | { paths: ['Docker*'] }                  | { 'Gemfile' => '' }                                | false
         'exact nested match'         | { paths: ['project/build.properties'] } | { 'project/build.properties' => '' }               | true
         'exact nested no match'      | { paths: ['project/build.properties'] } | { 'project/README.md' => '' }                      | false