patman: Move library functions into a library directory

The patman directory has a number of modules which are used by other tools
in U-Boot. This makes it hard to package the tools using pypi since the
common files must be copied along with the tool that uses them.

To address this, move these files into a new u_boot_pylib library. This
can be packaged separately and listed as a dependency of each tool.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/main.py b/tools/binman/main.py
index 14432a8..eef17b7 100755
--- a/tools/binman/main.py
+++ b/tools/binman/main.py
@@ -34,7 +34,7 @@
 sys.path.insert(2, our1_path)
 
 from binman import bintool
-from patman import test_util
+from u_boot_pylib import test_util
 
 # Bring in the libfdt module
 sys.path.insert(2, 'scripts/dtc/pylibfdt')
@@ -44,7 +44,7 @@
 
 from binman import cmdline
 from binman import control
-from patman import test_util
+from u_boot_pylib import test_util
 
 def RunTests(debug, verbosity, processes, test_preserve_dirs, args, toolpath):
     """Run the functional tests and any embedded doctests
@@ -95,7 +95,8 @@
         for path in toolpath:
             extra_args += ' --toolpath %s' % path
     test_util.run_test_coverage('tools/binman/binman', None,
-            ['*test*', '*main.py', 'tools/patman/*', 'tools/dtoc/*'],
+            ['*test*', '*main.py', 'tools/patman/*', 'tools/dtoc/*',
+             'tools/u_boot_pylib/*'],
             args.build_dir, all_set, extra_args or None)
 
 def RunBinman(args):