Arm backend: aot_arm_compiler.py: Create output dir (#11282)

Create output directory for the generated BundledProgram if it does not
already exist. This will save the user time by not having to rerun the
program due to it complaining that the directory does not exist.

Co-authored-by: Martin Lindström <[email protected]>

Author: martinlsm

examples/arm/aot_arm_compiler.py

@@ -668,6 +668,8 @@ def save_bpte_program(exec_prog, original_model: torch.nn.Module, output_name: s
         )
 
     # Generate BundledProgram
+    output_dir = os.path.dirname(output_name)
+    os.makedirs(output_dir, exist_ok=True)
     save_bundled_program(exec_prog, method_test_suites, output_name)