[Docs] Moves Control Flow Document to User Guides

Moves Control Flow document from Reference docs page to User guides page.

llvm-svn: 374733
diff --git a/llvm/docs/UserGuides.rst b/llvm/docs/UserGuides.rst
index abaa98c..1643778 100644
--- a/llvm/docs/UserGuides.rst
+++ b/llvm/docs/UserGuides.rst
@@ -19,6 +19,7 @@
    Benchmarking

    BigEndianNEON

    BuildingADistribution

+   CFIVerify

    CMake

    CMakePrimer

    CodeGenerator

@@ -75,6 +76,9 @@
 :doc:`CoverageMappingFormat`

   This describes the format and encoding used for LLVM’s code coverage mapping.

 

+:doc:`CFIVerify`

+  A description of the verification tool for Control Flow Integrity.

+

 LLVM Builds and Distributions

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