Mark LWG 2806 as complete. Libc++ speculatively shiped this change in 4.0

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@297074 91177308-0d34-0410-b5e6-96231b3b80d8

www/cxx1z_status.html

@@ -449,7 +449,7 @@
 	<tr><td><a href="http://wg21.link/LWG2801">2801</a></td><td>Default-constructibility of unique_ptr</td><td>Kona</td><td></td></tr>
 	<tr><td><a href="http://wg21.link/LWG2802">2802</a></td><td>shared_ptr constructor requirements for a deleter</td><td>Kona</td><td></td></tr>
 	<tr><td><a href="http://wg21.link/LWG2804">2804</a></td><td>Unconditional constexpr default constructor for istream_iterator</td><td>Kona</td><td></td></tr>
-	<tr><td><a href="http://wg21.link/LWG2806">2806</a></td><td>Base class of bad_optional_access</td><td>Kona</td><td></td></tr>
+	<tr><td><a href="http://wg21.link/LWG2806">2806</a></td><td>Base class of bad_optional_access</td><td>Kona</td><td>Complete</td></tr>
 	<tr><td><a href="http://wg21.link/LWG2807">2807</a></td><td>std::invoke should use std::is_nothrow_callable</td><td>Kona</td><td></td></tr>
 	<tr><td><a href="http://wg21.link/LWG2812">2812</a></td><td>Range access is available with &lt;string_view&gt;</td><td>Kona</td><td></td></tr>
 	<tr><td><a href="http://wg21.link/LWG2824">2824</a></td><td>list::sort should say that the order of elements is unspecified if an exception is thrown</td><td>Kona</td><td></td></tr>