src: More succient way to get directory portion of file path

Author: Jose Quijada

gyp/pylib/gyp/common.py

@@ -342,7 +342,7 @@ def __init__(self):
       # consequently ending up with current dir "/cygdrive/c/..." being prefixed to those, which was
       # obviously a non-existent path, for example: "/cygdrive/c/<some folder>/C:\<my win style abs path>".
       # See https://docs.python.org/2/library/tempfile.html#tempfile.mkstemp for more details
-      base_temp_dir = "" if IsCygwin() else os.path.split(filename)[0]
+      base_temp_dir = "" if IsCygwin() else os.path.dirname(filename)
       # Pick temporary file.
       tmp_fd, self.tmp_path = tempfile.mkstemp(
           suffix='.tmp',