kernel_fs_Punybench: fix punybench files path

Punybench has been moved to /opt/punybench, so change the path
definition to correct path.

BUG=None
TEST=Ran the test on nyan

Change-Id: I88b44256d5592b095305bd535118f6ea40e6d60d
Signed-off-by: Penny Chiu <pchiu@nvidia.com>
Reviewed-on: https://chromium-review.googlesource.com/186872
Reviewed-by: Sonny Rao <sonnyrao@chromium.org>
diff --git a/client/site_tests/kernel_fs_Punybench/kernel_fs_Punybench.py b/client/site_tests/kernel_fs_Punybench/kernel_fs_Punybench.py
index af32a03..49d59b7 100755
--- a/client/site_tests/kernel_fs_Punybench/kernel_fs_Punybench.py
+++ b/client/site_tests/kernel_fs_Punybench/kernel_fs_Punybench.py
@@ -15,7 +15,7 @@
     """Run a selected subset of the puny benchmarks
     """
     version = 1
-    Bin = '/usr/local/opt/punybench/bin/'
+    Bin = '/opt/punybench/bin/'
 
 
     def initialize(self):