port test suite to Android to run in emulator
Attached is the first stab at getting something from the test suite running in Android.
* there is no /tmp on Android, there is /data/local/tmp for root and the shell user
* no use in testing the user ID stuff, Android apps cannot ever change users
To get the full suite running, there will need to be larger changes:
* either switch Python code to plain _sh_ or hack to get Python running in Android emulator
* port _sh_ scripts to Android, it is not a full UNIX environment, so things like _printf_ and others are not always there.
* the shebang will need to be settable to `#!/system/bin/sh` or the tests need to be executed using `sh test_keygen.sh`
issue