Add adb support to skpbench

tools/skpbench/_os_path.py

+# Copyright 2016 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from os import path
+import glob
+
+def join(*pathnames):
+  return path.join(*pathnames)
+
+def basename(pathname):
+  return pathname.basename(pathname)
+
+def find_skps(skps):
+  pathnames = list()
+  for skp in skps:
+    if (path.isdir(skp)):
+      pathnames.extend(glob.iglob(path.join(skp, '*.skp')))
+    else:
+      pathnames.append(skp)
+  return pathnames