fix a copy-and-paste error in the docs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151480 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-stress/llvm-stress.cpp b/tools/llvm-stress/llvm-stress.cpp
index e24e766..e99d54b 100644
--- a/tools/llvm-stress/llvm-stress.cpp
+++ b/tools/llvm-stress/llvm-stress.cpp
@@ -1,4 +1,4 @@
-//===-- llvm-stress.cpp - Print the size of each object section ------------===//
+//===-- llvm-stress.cpp - Generate random LL files to stress-test LLVM -----===//
 //
 //                     The LLVM Compiler Infrastructure
 //