[llvm] [utils][tests] Adjust timeout-hang.py tolerances (PR #142089)

[David Spickett via llvm-commits]

================
@@ -8,20 +8,25 @@
 # throwing an exception. We expect this to fail immediately, rather than
 # timeout.
 
-# DEFINE: %{timeout}=1
+# DEFINE: %{grace_period}=5
----------------
DavidSpickett wrote:

I don't think the strategy you are adding is cryptic, but on top of this file passing itself to python, it can be tricky to comprehend the whole test case.

https://github.com/llvm/llvm-project/pull/142089