[C11] Claim conformance to WG14 N3159

This was a roll-up of defect reports that we already test elsewhere, so
no additional test coverage is needed.

DR345: tested by clang/test/C/drs/dr3xx.c
DR344: tested by clang/test/C/drs/dr3xx.c
DR343: tested by clang/test/C/drs/dr3xx.c
DR341: tested by clang/test/C/drs/dr3xx.c
DR340: tested by clang/test/C/drs/dr3xx.c
DR338: tested by clang/test/C/drs/dr338.c
DR336: N/A for the compiler
DR330: N/A for the compiler
DR329: N/A for the compiler
DR328: tested by clang/test/C/drs/dr3xx.c
DR327: editorial
DR326: N/A for the compiler
DR315: tested by clang/test/C/drs/dr3xx.c

clang/www/c_status.html

@@ -435,7 +435,8 @@ <h2 id="c11">C11 implementation status</h2>
     <tr>
       <td>Technical corrigendum for C1X</td>
       <td><a href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1359.htm">N1359</a></td>
-      <td class="unknown" align="center">Unknown</td>
+      <td class="full" align="center">Yes</td>
+      <!-- The DRs listed in the paper are individually tested in clang/test/C/drs/dr3xx.c and others -->
     </tr>
     <tr>
       <td>Benign typedef redefinition</td>