Lots of stuff is still horribly broken due to the weird confusion
between local/remote and "has project"/"does not have project" that
crept in at some point, but this at least makes remote, project-specific
memcheck work again.
Still broken:
    - Remote callgrind
    - All remote valgrinds for external projects.
    - Local remote valgrind is not even available (anymore), as
      the respective menu entries have disappeared at some point.

Change-Id: Iae6b60a0508d1b1b64fd0e0e5f776ea2c2e23598
Reviewed-by: hjk <hjk@theqtcompany.com>