WIP: Work around compiler bug which is being filed upstream

Author: ldionne

libcxx/include/module.modulemap

@@ -1603,7 +1603,10 @@ module std [system] {
   module new {
     header "new"
     module align_val_t          { header "__new/align_val_t.h" }
-    module allocate             { header "__new/allocate.h" }
+    module allocate             {
+      header "__new/allocate.h"
+      export * // TODO: Workaround for rdar://121551667
+    }
     module destroying_delete_t  { header "__new/destroying_delete_t.h" }
     module exceptions           { header "__new/exceptions.h" }
     module global_new_delete    { header "__new/global_new_delete.h" }