[5/9] msi: Set/unset the SourceDir property at the right stage in the execution sequence.

[testbot at testbot.winehq.org]

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
http://testbot.winehq.org/JobDetails.pl?Key=3771

Your paranoid android.


=== W98SE (32 bit install) ===
Timeout

=== W2K3R2SESP2 (32 bit install) ===
Timeout

=== W7PROX64 (32 bit install) ===
install.c:3713: Test failed: Expected imaname, got ðõ‡
install.c:3724: Test failed: Expected 314, got 12
install.c:3730: Test failed: Expected OrderTestValue, got ðõ‡