rpcrt4/tests: Add a couple of tests for marshalling an array of strings. Take 2.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://newtestbot.winehq.org/JobDetails.pl?Key=5736

Your paranoid android.


=== w8 (32 bit server) ===
server.c:984: Test failed: get_ranged_enum() returned 1997012995 instead of RE3
server.c:984: Test failed: get_ranged_enum() returned -65533 instead of RE3
server.c:984: Test failed: get_ranged_enum() returned 1997012995 instead of RE3