[sanitizer] Remove spurious semi-colon

Summary:
An extra ';' at the end of a namespace triggers a pedantic warning:
```
.../sanitizer_common/sanitizer_type_traits.h:42:2: warning: extra ‘;’ [-Wpedantic]
 };  // namespace __sanitizer
```

Reviewers: eugenis, delcypher

Reviewed By: eugenis

Subscribers: kubamracek, #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D55849

llvm-svn: 349666

compiler-rt/lib/sanitizer_common/sanitizer_type_traits.h

@@ -39,6 +39,6 @@ struct is_same : public false_type {};
 template <typename T>
 struct is_same<T, T> : public true_type {};
 
-};  // namespace __sanitizer
+}  // namespace __sanitizer
 
 #endif