Finished semantic analysis of anonymous unions in C++.

Duplicate-member checking within classes is still a little messy, and
anonymous unions are still completely broken in C. We'll need to unify
the handling of fields in C and C++ to make this code applicable in
both languages.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@61878 91177308-0d34-0410-b5e6-96231b3b80d8
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@@ -1077,10 +1077,10 @@
 <tr>

   <td>&nbsp;&nbsp;9.5 [class.union]</td>

   <td class="complete" align="center">&#x2713;</td>  

-  <td></td>

-  <td></td>

-  <td></td>

-  <td></td>

+  <td class="complete" align="center">&#x2713;</td>

+  <td class="medium"></td>

+  <td class="medium"></td>

+  <td>Semantic analysis does not yet check all of the requirements placed on the members of unions.</td>

 </tr>

 <tr>

   <td>&nbsp;&nbsp;9.6 [class.bit]</td>