[llvm] [debuginfo-tests] Use built lldb for testing if available (PR #131681)

[Adrian Prantl via llvm-commits]

================
@@ -37,7 +37,10 @@
 tools = [
     ToolSubst(
         "%test_debuginfo",
-        command=os.path.join(
+        command="LLVM_LIBS_DIR="
+        + config.llvm_libs_dir
+        + " "
+        + os.path.join(
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adrian-prantl wrote:

why don't we pass in the right python executable and the full path to the LLDB python packages here, then there doesn't need to be any guesswork in the other two files.

https://github.com/llvm/llvm-project/pull/131681