[PATCH 1/5] msi/tests: Add a header for some common functions.

[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://testbot.winehq.org/JobDetails.pl?Key=38356

Your paranoid android.


=== wxppro (32 bit install) ===
msi:install contains a misplaced failure message for custom

=== w7u (32 bit install) ===
The task timed out

=== w7u (32 bit msi) ===
The task timed out

=== w7u (32 bit action) ===
The task timed out

=== w7pro64 (32 bit custom) ===
The previous 1 run(s) terminated abnormally

=== w7pro64 (64 bit custom) ===
The previous 1 run(s) terminated abnormally