fix skipif

Signed-off-by: Jade Abraham <jade.abraham@hpe.com>

Author: jabraham17

test/llvm/debugInfo/lldb/SKIPIF

@@ -5,7 +5,7 @@ if command -v lldb >/dev/null ; then
   # Sept 10, 2025: skip if lldb does not have python support
   # required for pretty printing which affects the output of the tests
   python_path=$(lldb --python-path 2>/dev/null)
-  if [ -z "$python_path" ]; then
+  if [[ -z "$python_path" || ! -x "$python_path" ]]; then
     echo "True"
   else
     echo "False"