NEON vector support for ARM is in pretty good shape now.  Update the docs.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@123183 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/UsersManual.html b/docs/UsersManual.html
index 51b33bd..bad9bae 100644
--- a/docs/UsersManual.html
+++ b/docs/UsersManual.html
@@ -961,15 +961,8 @@
 
 <p>The support for ARM (specifically ARMv6 and ARMv7) is considered stable on
 Darwin (iOS): it has been tested to correctly compile many large C, C++,
-Objective-C, and Objective-C++ codebases.</p>
-
-<p>It is not quite feature complete, the following areas still need work:</p>
-<ul>
-  <li>Vector support (NEON in particular) is not yet well tested and may have
-    ABI errors.</li>
-  <li>Clang only supports a limited number of ARM architectures. It does not yet
-    fully support ARMv5, for example.</li>
-</ul>
+Objective-C, and Objective-C++ codebases.  Clang only supports a limited number
+of ARM architectures. It does not yet fully support ARMv5, for example.</p>
 
 <!-- ======================== -->
 <h4 id="target_arch_other">Other platforms</h4>