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

[Donát Nagy via cfe-commits]

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@@ -173,13 +173,16 @@ def have_host_clang_repl_cuda():
     config.available_features.add("staticanalyzer")
     tools.append("clang-check")
 
+    I_z3_include_dir = ""
     if config.clang_staticanalyzer_z3:
         config.available_features.add("z3")
-        config.substitutions.append(
-            ("%z3_include_dir", config.clang_staticanalyzer_z3_include_dir)
-        )
+        if config.clang_staticanalyzer_z3_include_dir:
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NagyDonat wrote:

Thanks for researching this!

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