cabal: add missing depend to 'test-suite', guard against 'kqueue' on linux

Fixes the following test failure:

Preprocessing test suite 'test' for git-annex-3.20121211...

Remote/Git.hs:42:8:
    Could not find module `Control.Concurrent.MSampleVar'
    It is a member of the hidden package `SafeSemaphore-0.9.0'.
    Perhaps you need to add `SafeSemaphore' to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

0 files changed, 0 insertions, 0 deletions