fix copy-and-pasto


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10907 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/Support/ThreadSupport.h b/include/Support/ThreadSupport.h
index 1a5f005..21c1073 100644
--- a/include/Support/ThreadSupport.h
+++ b/include/Support/ThreadSupport.h
@@ -25,8 +25,8 @@
 #endif // If no system support is available
 
 namespace llvm {
-  /// LockHolder - Instances of this class acquire a given Lock when constructed
-  /// and hold that lock until destruction.
+  /// MutexLocker - Instances of this class acquire a given Lock when
+  /// constructed and hold that lock until destruction.
   ///
   class MutexLocker {
     Mutex &M;