[libc++] NFC: Add missing all.h to the modulemap

NOKEYCHECK=True
GitOrigin-RevId: 87dbe6c4ef4fdaac093ff82a7bd2b2ca2cf5bc3a
diff --git a/include/module.modulemap b/include/module.modulemap
index de3daf8..dc89843 100644
--- a/include/module.modulemap
+++ b/include/module.modulemap
@@ -555,6 +555,7 @@
 
     module __ranges {
       module access                 { header "__ranges/access.h"                }
+      module all                    { header "__ranges/all.h"                   }
       module concepts               { header "__ranges/concepts.h"              }
       module data                   { header "__ranges/data.h"                  }
       module empty                  { header "__ranges/empty.h"                 }