Documentation: add MemorySanitizer to the toctree


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171003 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/index.rst b/docs/index.rst
index 038e943..fbb0d4f 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -16,9 +16,10 @@
    LibASTMatchers
    LibTooling
    PCHInternals
-   ThreadSanitizer
    Tooling
    AddressSanitizer
+   ThreadSanitizer
+   MemorySanitizer
    ClangPlugins
    ClangTools
    HowToSetupToolingForLLVM