Add thunks for MojoDuplicateHandle[WithReducedRights]().

mojo/edk/embedder/entrypoints.cc

Index: mojo/edk/embedder/entrypoints.cc
diff --git a/mojo/edk/embedder/entrypoints.cc b/mojo/edk/embedder/entrypoints.cc
index b500f6bb0733d2a4fe48193cde061cdef3bb0755..260eae0b83f6e1b3a3742dee1c2fcd7707e1c22c 100644
--- a/mojo/edk/embedder/entrypoints.cc
+++ b/mojo/edk/embedder/entrypoints.cc
@@ -31,6 +31,19 @@ MojoResult MojoGetRights(MojoHandle handle, MojoHandleRights* rights) {
   return g_core->GetRights(handle, MakeUserPointer(rights));
 }
 
+MojoResult MojoDuplicateHandleWithReducedRights(
+    MojoHandle handle,
+    MojoHandleRights rights_to_remove,
+    MojoHandle* new_handle) {
+  return g_core->DuplicateHandleWithReducedRights(handle, rights_to_remove,
+                                                  MakeUserPointer(new_handle));
+}
+
+MojoResult MojoDuplicateHandle(MojoHandle handle, MojoHandle* new_handle) {
+  return g_core->DuplicateHandleWithReducedRights(
+      handle, MOJO_HANDLE_RIGHT_NONE, MakeUserPointer(new_handle));
+}
+
 MojoResult MojoWait(MojoHandle handle,
                     MojoHandleSignals signals,
                     MojoDeadline deadline,