Fix the tool documentation

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156729 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CommandGuide/llvm-stress.rst b/docs/CommandGuide/llvm-stress.rst
index 5d0dbb8..44aa32c 100644
--- a/docs/CommandGuide/llvm-stress.rst
+++ b/docs/CommandGuide/llvm-stress.rst
@@ -6,7 +6,7 @@
 --------
 
 
-**llvm-cov** [-gcno=filename] [-gcda=filename] [dump]
+**llvm-stress** [-size=filesize] [-seed=initialseed] [-o=outfile]
 
 
 DESCRIPTION