[PATCH v11] Add pretty printers for the NPTL lock types

[Stefan Liebler]

Hi Martin,

as information:
I`ve build and run testsuite on s390 (64/31bit) with debug information 
on a system with all the requirements and all the printer-tests pass.
Without debug information, the attr-printer-tests are now marked 
unsupported as described in INSTALL and the other three printer-tests 
are passing.

On a system without correct python/pexpect version, all the 
printer-tests are marked as unsupported.

Bye
Stefan