[libc++] Split up __memory/base.h into meaningful headers

GitOrigin-RevId: f992cfba7173ab55d9795f71156ffde0b5eece0a
diff --git a/include/exception b/include/exception
index 4bf4049..37751d9 100644
--- a/include/exception
+++ b/include/exception
@@ -78,7 +78,7 @@
 
 #include <__config>
 #include <__availability>
-#include <__memory/base.h>
+#include <__memory/addressof.h>
 #include <cstddef>
 #include <cstdlib>
 #include <type_traits>