[Bug 20987] New: msi tests can't be run in parallel

http://bugs.winehq.org/show_bug.cgi?id=20987

Summary: msi tests can't be run in parallel
           Product: Wine
           Version: 1.1.34
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: testcases
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

We spend an awful lot of time waiting for tests to finish.
It'd be awesome if "make -j 100 test" worked.

As a first step, let's make the msi tests work in parallel.
"make -j100" in the msi directory explodes at the moment
because many of the tests use the same filenames.