[clang] [analyzer] Fix tests broken by empty %z3_include_dir (PR #146042)

[Balazs Benics via cfe-commits]

=?utf-8?q?Don=C3=A1t?= Nagy <donat.nagy at ericsson.com>
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In-Reply-To: <llvm.org/llvm/llvm-project/pull/146042 at github.com>


https://github.com/steakhal requested changes to this pull request.

I'm not convinced about this change.

https://github.com/llvm/llvm-project/pull/146042