Output:

Traceback (most recent call last):
  File "prebuilt/darwin-x86_64/bin/ndk-gdb.py", line 38, in <module>
    import gdbrunner
ImportError: No module named gdbrunner

The relevant code is:

NDK_PATH = os.path.normpath(os.path.join(os.path.dirname(__file__), '../..'))
sys.path.append(os.path.join(NDK_PATH, "python-packages"))
import gdbrunner

ndk-gdb.py is at prebuilt/darwin-x86_64/bin/ndk-gdb.py, so this adds $NDK_PATH/prebuilt/darwin-x86_64/bin/../../python-packages, i.e. $NDK_PATH/prebuilt/python-packages. The correct path seems to be $NDK_PATH/python-packages. If I change '../..' to '../../..', it gets further (but still fails).