Buildbot : WHS builder needs a second try to get manual launch right

I found this while testing PR 1302

This can be seen here :

https://build.reactos.org/builders/Test%20WHS/builds/1690

https://build.reactos.org/builders/Test%20WHS/builds/1691

The first run doesn't upload the right binaries to the VM (look at the kmtest:MmSection tests). The test output is the same as the previous build.

The second run gets it right.