Implement most of P0607: Inline Variables for the Standard Library. This involved marking a lot of variables as inline (but only for C++17 and later).

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@321658 91177308-0d34-0410-b5e6-96231b3b80d8

www/cxx1z_status.html

@@ -161,7 +161,7 @@
 	<tr><td><a href="https://wg21.link/P0574R1">P0574R1</a></td><td>LWG</td><td>Algorithm Complexity Constraints and Parallel Overloads</td><td>Kona</td><td></td><td></td></tr>
 	<tr><td><a href="https://wg21.link/P0599R1">P0599R1</a></td><td>LWG</td><td>noexcept for hash functions</td><td>Kona</td><td>Complete</td><td>5.0</td></tr>
 	<tr><td><a href="https://wg21.link/P0604R0">P0604R0</a></td><td>LWG</td><td>Resolving GB 55, US 84, US 85, US 86</td><td>Kona</td><td></td><td></td></tr>
-	<tr><td><a href="https://wg21.link/P0607R0">P0607R0</a></td><td>LWG</td><td>Inline Variables for the Standard Library</td><td>Kona</td><td></td><td></td></tr>
+	<tr><td><a href="https://wg21.link/P0607R0">P0607R0</a></td><td>LWG</td><td>Inline Variables for the Standard Library</td><td>Kona</td><td>In Progress</td><td>6.0</td></tr>
 	<tr><td><a href="https://wg21.link/P0618R0">P0618R0</a></td><td>LWG</td><td>Deprecating &lt;codecvt&gt;</td><td>Kona</td><td></td><td></td></tr>
 	<tr><td><a href="https://wg21.link/P0623R0">P0623R0</a></td><td>LWG</td><td>Final C++17 Parallel Algorithms Fixes</td><td>Kona</td><td></td><td></td></tr>
   	<tr><td></td><td></td><td></td><td></td><td></td><td></td></tr>
@@ -171,6 +171,8 @@
 <!--  	<tr><td></td><td></td><td></td><td></td><td></td><td></td></tr> -->
   </table>
 
+<p><i>The parts of P0607 that are not done are for <tt>has_unique_object_representations_v</tt>, <tt>is_callable_v</tt> and <tt>is_nothrow_callable_v</tt>, plus the &lt;regex&gt; bits.</i></p>
+
 <p><i>[ Note: "Nothing to do" means that no library changes were needed to implement this change -- end note]</i></p>
 
   <h3>Library Working group Issues Status</h3>