sw/vec_iree: Update lit test renode location

Change-Id: I8e7cde763fa4d2197817cfdda568cbfee069694b

samples/lit.cfg.py

diff --git a/samples/lit.cfg.py b/samples/lit.cfg.py
index f83b488..f77c6f1 100644
--- a/samples/lit.cfg.py
+++ b/samples/lit.cfg.py
@@ -39,7 +39,7 @@
             f"{config.environment['OUT']}/host/qemu/qemu-system-riscv32")
 renode_cmd = (f"{config.environment['ROOTDIR']}/sw/vec/scripts/test_runner.py "
               "renode --renode-path "
-              f"{config.environment['OUT']}/host/renode/renode")
+              f"{os.getenv('CACHE')}/renode/renode")
 
 config.test_exec_root = os.path.dirname(__file__) + "/tests"