tests: add some qemu_strtosz() tests While reading the function I decided to write some tests. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <1442419377-9309-2-git-send-email-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>