testing/testcase: snapshot bin/*

It's also interesting to see what scripts have been generated

slapos/testing/testcase.py

@@ -292,6 +292,7 @@ class SlapOSInstanceTestCase(unittest.TestCase):
   _test_file_snapshot_directory = ""  # directory to save snapshot files for inspections
   # patterns of files to save for inspection, relative to instance directory
   _save_instance_file_pattern_list = (
+      '*/bin/*',
       '*/etc/*',
       '*/var/log/*',
       '*/.*log',