llvm_tools: add exist_ok=True to state dir creation

we just want to make sure that the state file directory exists here.

BUG=None
TEST=Ran

Change-Id: I563821a357e2863c0a71570cfcb7319401a03778
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2460837
Tested-by: George Burgess <gbiv@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
diff --git a/llvm_tools/upload_lexan_crashes_to_forcey.py b/llvm_tools/upload_lexan_crashes_to_forcey.py
index 216511f..b93f51a 100755
--- a/llvm_tools/upload_lexan_crashes_to_forcey.py
+++ b/llvm_tools/upload_lexan_crashes_to_forcey.py
@@ -227,7 +227,7 @@
   state_file = opts.state_file
   last_date_str = opts.last_date
 
-  os.makedirs(os.path.dirname(state_file), 0o755)
+  os.makedirs(os.path.dirname(state_file), 0o755, exist_ok=True)
 
   if last_date_str is None:
     with open(state_file, encoding='utf-8') as f: