Note EH stuff for x86-64/linux

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57378 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html
index 1247e56..39ff050 100644
--- a/docs/ReleaseNotes.html
+++ b/docs/ReleaseNotes.html
@@ -265,6 +265,7 @@
 </p>
 
 <ul>
+<li>Exception handling is supported by default on x86-64 linux platform.</li>
 <li>...</li>
 
 </ul>
@@ -529,9 +530,8 @@
 itself, Qt, Mozilla, etc.</p>
 
 <ul>
-<li>Exception handling works well on the X86 and PowerPC targets, including
-X86-64 darwin.  This works when linking to a libstdc++ compiled by GCC.  It is
-supported on X86-64 linux, but that is disabled by default in this release.</li>
+<li>Exception handling works well on the X86 and PowerPC targets. Currently
+  only linux and darwin targets are supported (both 32 and 64 bit).</li>
 </ul>
 
 </div>