test: fix test-qxl-parsing on ppc64el and armhf

On ppc64el and armhf the handling of "1 << mem_info.memslot_id_shift" will end up beign a zero which breaks the test.

Marking the implicit value 1 as a 64 bit value (to match the uint64_t target) fixes the issue.

Fixes #31

Signed-off-by: Christian Ehrhardt christian.ehrhardt@canonical.com