[Test] Mix in another experimental feature.

Author: nate-chandler

validation-test/SILOptimizer/moveonly_partial_consumption_linked_list.swift

@@ -2,6 +2,7 @@
 // RUN:     %s \
 // RUN:     -enable-builtin-module \
 // RUN:     -enable-experimental-feature MoveOnlyPartialConsumption \
+// RUN:     -enable-experimental-feature BorrowingSwitch \
 // RUN:     -enable-experimental-feature NoncopyableGenerics \
 // RUN:     -sil-verify-all \
 // RUN:     -verify