Document removed flags in release notes

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204438 91177308-0d34-0410-b5e6-96231b3b80d8

docs/ClangTools.rst

@@ -94,7 +94,7 @@ refactoring tools, e.g. to do a reformatting of all the lines changed during a
 renaming.
 
 ``clang-modernize``
-~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~
 ``clang-modernize`` migrates C++ code to use C++11 features where appropriate.
 Currently it can:
 

docs/ReleaseNotes.rst

@@ -88,6 +88,10 @@ respectively.  `-integrated-as` and `-no-integrated-as` are now considered
 legacy flags (but are available as an alias to prevent breaking existing users),
 and users are encouraged to switch to the equivalent new feature flag.
 
+Deprecated flags `-faddress-sanitizer`, `-fthread-sanitizer`,
+`-fcatch-undefined-behavior` and `-fbounds-checking` were removed in favor of
+`-fsanitize=` family of flags.
+
 C Language Changes in Clang
 ---------------------------