docs: Added a couple more LP bug fixes to the Release Notes.

documentation/RELEASE_NOTES.html

@@ -51,6 +51,9 @@ fixed in this release:</p>
 <li>572589
   <a href="https://bugs.launchpad.net/epics-base/+bug/572589">
     Make dbl emit empty strings for non-existent fields</a></li>
+<li>595154
+  <a href="https://bugs.launchpad.net/epics-base/+bug/595154">
+    C++ errors building base using cygwin1.7</a></li>
 <li>595240
   <a href="https://bugs.launchpad.net/epics-base/+bug/595240">
     C code uses C++ keywords as variable names</a></li>
@@ -84,6 +87,9 @@ fixed in this release:</p>
 <li>667384
   <a href="https://bugs.launchpad.net/epics-base/+bug/667384">
     are the request and response bytes pending reversed in casr?</a></li>
+<li>680702
+  <a href="https://bugs.launchpad.net/epics-base/+bug/680702">
+    calc and calcout record get_precision bug</a></li>
 </ul>
 
 <h4>Support for Cygwin 1.7</h4>