[libc++] NFC: Fix incorrect comments in CMake

GitOrigin-RevId: feef171f762aa205b5f993e127b364f501a4d002
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 385c43e..788fd5a 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,4 +1,4 @@
-include(AddLLVM) # for configure_lit_site_cfg and add_lit_target
+include(AddLLVM) # for configure_lit_site_cfg and add_lit_testsuite
 macro(pythonize_bool var)
   if (${var})
     set(${var} True)