[LNT] add __pycache__ to ignored files

[danilaml]

Summary

Fixes WARNING: ignoring item 'pycache' ... warnings

[thopre]

LGTM

[danilaml]

Landed in https://github.com/llvm/llvm-lnt/commit/2e93cbd17fd5eb4b2e3773e5022186feac554d7c

lnt/server/db/migrate.py

def _load_migrations():
     # the testsuite.
     for schema_name in ('__core__',):
         schema_migrations_path = os.path.join(os.path.dirname(__file__),
                                               'migrations')
         schema_migrations = {}
         for item in os.listdir(schema_migrations_path):
             # Ignore certain known non-scripts.
             if item in ('README.txt', '__init__.py', 'new_suite.py',
-                        'util.py') or item.endswith('.pyc'):
+                        'util.py', '__pycache__') or item.endswith('.pyc'):
                 continue
 
             # Ignore non-matching files.
             m = upgrade_script_rex.match(item)
             if m is None:
                 logger.warning(
                     "ignoring item %r in schema migration directory: %r",
                     item, schema_migrations_path)

lnt/server/db/rules_manager.py

def load_rules():
 
     rule_script_rex = re.compile(
         r'^rule_(.*)\.py$')
     rule_scripts = {}
 
     rules_path = os.path.join(os.path.dirname(__file__), 'rules')
     for item in os.listdir(rules_path):
         # Ignore certain known non-scripts.
-        if item in ('README.txt', '__init__.py') or item.endswith('.pyc'):
+        if item in ('README.txt', '__init__.py',
+                    '__pycache__') or item.endswith('.pyc'):
             continue
 
         # Ignore non-matching files.
         m = rule_script_rex.match(item)
         if m is None:
             logger.warning("ignoring item {} in rule  directory: {}"
                            .format(item, rules_path))
             continue