marl: fix extra ';' warning

Will upstream same fix to marl project soon.

Bug: b/173784261
Change-Id: I8402ccd4f0379ea5d31155fe9aa0a81dc892ebee
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/50669
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>
diff --git a/third_party/marl/include/marl/thread.h b/third_party/marl/include/marl/thread.h
index 97bb98e..68434cb 100644
--- a/third_party/marl/include/marl/thread.h
+++ b/third_party/marl/include/marl/thread.h
@@ -63,7 +63,7 @@
     // Affinity for the given thread by id.
     class Policy {
      public:
-      virtual ~Policy(){};
+      virtual ~Policy() {}
 
       // anyOf() returns a Policy that returns an Affinity for a number of
       // available cores in affinity.