run: set abs_builddir variables

test-lib.sh needs these to be set.

Export them so that the virsh-* tests can be run using:
  builddir$ ./run srcdir/tests/virsh-snapshot

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>

run.in

@@ -80,6 +80,9 @@ env["LIBVIRT_DIR_OVERRIDE"] = "1"
 # read problems when using glibc.
 env["MALLOC_PERTURB_"] = "%d" % random.randint(1, 255)
 
+env["abs_builddir"] = "@abs_builddir@"
+env["abs_top_builddir"] = "@abs_top_builddir@"
+
 modular_daemons = [
     "virtinterfaced",
     "virtlxcd",