patman: Move to absolute imports

At present patman sets the python path on startup so that it can access
the libraries it needs. If we convert to use absolute imports this is not
necessary.

Move patman to use absolute imports. This requires changes in tools which
use the patman libraries (which is most of them).

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/binman/main.py

@@ -36,7 +36,7 @@ sys.path.append(get_python_lib())
 
 from binman import cmdline
 from binman import control
-import test_util
+from patman import test_util
 
 def RunTests(debug, verbosity, processes, test_preserve_dirs, args, toolpath):
     """Run the functional tests and any embedded doctests