ci: enable fuzzing in Azure Pipelines

This was disabled to improve iteration speed while hacking on the Azure
Pipelines integration.

Author: indygreg

ci/azure-pipelines-template.yml

@@ -15,13 +15,13 @@ jobs:
 
   variables:
     # Enable fuzzing tests, other expensive tests.
-    #ZSTD_SLOW_TESTS: '1'
+    ZSTD_SLOW_TESTS: '1'
 
     # Make all compile warnings fatal.
     ZSTD_WARNINGS_AS_ERRORS: '1'
 
     # More thorough fuzzing coverage.
-    #HYPOTHESIS_PROFILE: ci
+    HYPOTHESIS_PROFILE: ci
 
   steps:
   - script: choco install vcpython27 --yes