Add more fuzzing bits: partial_sort_copy, partition_copy, unique, unique_copy. No functional change to libc++; this is all test infastructure

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@316951 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/fuzzing/RoutineNames.txt b/fuzzing/RoutineNames.txt
index cbfe415..06ef70e 100644
--- a/fuzzing/RoutineNames.txt
+++ b/fuzzing/RoutineNames.txt
@@ -1,9 +1,13 @@
 sort
 stable_sort
 partition
+partition_copy
 stable_partition
+unique
+unique_copy
 nth_element
 partial_sort
+partial_sort_copy
 make_heap
 push_heap
 pop_heap