Fix .cpp files claiming to be header files

llvm-svn: 211334
diff --git a/llvm/lib/Support/DynamicLibrary.cpp b/llvm/lib/Support/DynamicLibrary.cpp
index 82d7c0c..d2b551e 100644
--- a/llvm/lib/Support/DynamicLibrary.cpp
+++ b/llvm/lib/Support/DynamicLibrary.cpp
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-//  This header file implements the operating system DynamicLibrary concept.
+//  This file implements the operating system DynamicLibrary concept.
 //
 // FIXME: This file leaks ExplicitSymbols and OpenedHandles!
 //