The layout of my home directory is somewhat peculiar: I store
all git repositories in ~/src/upstream, but since I spend
almost all of my time hacking on libvirt, I also have a
convenience symlink ~/src/libvirt -> ~/src/upstream/libvirt
that I use to access that specific git repository.

The above setup has served me well for years; however, ever
since commit ca147162 dropped our own custom definitions
for abs_{,top_}{src,build}dir and started using the ones
provided by autotools, virstoragetest has started reliably
failing with errors such as

   2) Storage backing chain 2 ...
  Offset 0
  Expect [chain member: 0
  path:/home/abologna/src/upstream/libvirt/tests/virstoragedata/raw
  backingStoreRaw: <null>
  capacity: 0
  encryption: 0
  relPath:<null>
  type:1
  format:1
  protocol:none
  hostname:<null>
  ]
  Actual [chain member: 0
  path:/home/abologna/src/libvirt/tests/virstoragedata/raw
  backingStoreRaw: <null>
  capacity: 0
  encryption: 0
  relPath:<null>
  type:1
  format:1
  protocol:none
  hostname:<null>
  ]
                              ... FAILED

Using abolute paths instead of canonical ones in the tests makes
the problem go away.

Note that all tests that are specifically designed to test path
canonicalization via TEST_PATH_CANONICALIZE() were passing even
before this patch and are not touched by it.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Acked-by: NMichal Privoznik <mprivozn@redhat.com>