[PATCH] rpcrt4: Use wide-char string literals.

[Marvin]

Hi,

While running your changed tests, 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://testbot.winehq.org/JobDetails.pl?Key=82695

Your paranoid android.


=== w10pro64 (32 bit report) ===

rpcrt4:
server.c:2181: Test failed: RpcBindingFree

=== w864 (64 bit report) ===

rpcrt4:
server.c:2181: Test failed: done

=== w10pro64_he (64 bit report) ===

rpcrt4:
server.c:2181: Test failed: RpcBindingFree

=== w10pro64_ja (64 bit report) ===

rpcrt4:
server.c:2181: Test failed: RpcBindingFree