[Docs] Adds sections for Command Line and LibFuzzer articles

Adds sections for Command Line and Libfuzzer articles on Programming Documentation page.

llvm-svn: 373158

Author: drichards-87

llvm/docs/ProgrammingDocumentation.rst

@@ -28,27 +28,35 @@ For developers of applications which use LLVM as a library.
 :doc:`Extensions`
   LLVM-specific extensions to tools and formats LLVM seeks compatibility with.
 
-:doc:`CommandLine`
-  Provides information on using the command line parsing library.
-
 :doc:`HowToSetUpLLVMStyleRTTI`
   How to make ``isa<>``, ``dyn_cast<>``, etc. available for clients of your
   class hierarchy.
 
 :doc:`ExtendingLLVM`
   Look here to see how to add instructions and intrinsics to LLVM.
 
-:doc:`LibFuzzer`
-  A library for writing in-process guided fuzzers.
-
-:doc:`FuzzingLLVM`
-  Information on writing and using Fuzzers to find bugs in LLVM.
-
 :doc:`ScudoHardenedAllocator`
   A library that implements a security-hardened `malloc()`.
 
+:doc:`GwpAsan`
+  A sampled heap memory error detection toolkit designed for production use.
+
+============
+Command Line
+============
+
+:doc:`CommandLine`
+  Provides information on using the command line parsing library.
+
 :doc:`OptBisect`
   A command line option for debugging optimization-induced failures.
 
-:doc:`GwpAsan`
-  A sampled heap memory error detection toolkit designed for production use.
+=========
+LibFuzzer
+=========
+
+:doc:`LibFuzzer`
+  A library for writing in-process guided fuzzers.
+
+:doc:`FuzzingLLVM`
+  Information on writing and using Fuzzers to find bugs in LLVM.