[libc++] Make _LIBCPP_DEBUG_RANDOMIZE_RANGE a function

Reviewed By: ldionne, Mordante, var-const, #libc

Spies: mgorny, libcxx-commits

Differential Revision: https://reviews.llvm.org/D128181

NOKEYCHECK=True
GitOrigin-RevId: 2aea8af25136b2d336249d099e254639168b33c7
diff --git a/include/module.modulemap.in b/include/module.modulemap.in
index 3e191dc..a523579 100644
--- a/include/module.modulemap.in
+++ b/include/module.modulemap.in
@@ -747,6 +747,11 @@
     header "latch"
     export *
   }
+
+  module __debug_utils {
+    module randomize_range { private header "__debug_utils/randomize_range.h" }
+  }
+
   module limits {
     header "limits"
     export *