scripts/symlink-install-tree.py: Fix MESONINTROSPECT parsing

The arguments in MESONINTROSPECT are quoted with shlex.quote() so it
must be parsed with shlex.split().  Otherwise the script will fail if
the build directory has a character like "~" in it.

Note: this fix cannot be backported directly to any stable branch
that doesn't require Meson version 1.4.0 or better; otherwise it will
work OK on Linux but will break on Windows hosts.

(Unfortunately, Meson prior to version 1.4.0 was inconsistent between
host OSes about how it quoted arguments, and used a different quoting
process on Windows hosts.  Our current git trunk already requires
1.5.0 as of commit 07f0d326 ("Require meson version 1.5.0"), but
the stable branches are still on older Meson.)

Fixes: cf60ccc3 ("cutils: Introduce bundle mechanism")
Reported-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Tested-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-id: 20241018130852.931509-1-peter.maydell@linaro.org
[PMM: Updated commit message to give all the detail about the
Meson version compability requirements.]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>