debmake failes with rsync error when working directory path contains space with --tar

[林博仁(Buo-ren Lin)]

## Bug Reproduce Instructions
1. mkdir "directory with space"
1. cd "directory with space"
1. debmake --package directory-with-space --upstreamversion 1.0 --tar

## Console output

```
I: set parameters
I: sanity check of parameters
W: -p "directory-with-space" != auto set value ""
W: -u "1.0" != auto set value "0~1707100151"
I: pkg="directory-with-space", ver="1.0", rev="1"
I: make the upstream tarball with "tar --exclude=debian"
I: pwd = "/tmp/directory with space"
I: pwd = "/tmp"
I: $ rsync -av --link-dest=/tmp/directory with space directory with space/. directory-with-space-1.0
sending incremental file list
rsync: link_stat "/tmp/with" failed: No such file or directory (2)
rsync: link_stat "/tmp/space" failed: No such file or directory (2)
rsync: link_stat "/tmp/directory" failed: No such file or directory (2)
rsync: link_stat "/tmp/with" failed: No such file or directory (2)
rsync: change_dir "/tmp//space" failed: No such file or directory (2)
--link-dest arg does not exist: /tmp/directory

sent 20 bytes received 63 bytes 166.00 bytes/sec
total size is 0 speedup is 0.00
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1183) [sender=3.1.1]
E: rsync -aCv failed.
```