binman: Allow easy importing of entry modules

At present entry modules can only be accessed using Entry.Lookup() or
Entry.Create(). Most of the time this is fine, but sometimes a module
needs to provide constants or helper functions useful to other modules.
It is easier in this case to use 'import'.

Add an __init__ file to permit this.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/entry.py b/tools/binman/entry.py
index 00bb1d1..a04e149 100644
--- a/tools/binman/entry.py
+++ b/tools/binman/entry.py
@@ -513,6 +513,8 @@
             modules.remove('_testing')
         missing = []
         for name in modules:
+            if name.startswith('__'):
+                continue
             module = Entry.Lookup(name, name)
             docs = getattr(module, '__doc__')
             if test_missing == name:
diff --git a/tools/binman/etype/__init__.py b/tools/binman/etype/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tools/binman/etype/__init__.py
diff --git a/tools/patman/test_util.py b/tools/patman/test_util.py
index 4009815..09f258c 100644
--- a/tools/patman/test_util.py
+++ b/tools/patman/test_util.py
@@ -58,6 +58,7 @@
         test_set = set([os.path.splitext(os.path.basename(line.split()[0]))[0]
                         for line in lines if '/etype/' in line])
         missing_list = required
+        missing_list.discard('__init__')
         missing_list.difference_update(test_set)
         if missing_list:
             print('Missing tests for %s' % (', '.join(missing_list)))