Fix comment about LTO and autolinking in lit.cfg (#39362)

Author: kubamracek

test/lit.cfg

@@ -946,13 +946,9 @@ if run_vendor == 'apple':
         lit_config.note('Using freestanding resource dir: ' + new_resource_dir)
 
     # Auto-linking does not work when stdlib is built with LTO, because linked
-    # libraries are discovered too late (after optimizations are applied). Let's
-    # explicitly link all libraries needed in tests.
-    #
-    # Note that this won't work on Linux (without LLD). The autolinking
-    # mechanism on Linux will fail due to needing -L arguments to the path even
-    # with this forced linking as the extracted commands will force the linker
-    # to look up the linking by name as well.
+    # libraries are discovered too late (after optimizations are applied), and
+    # ld64 hits an assert and crashes. Until ld64 fixes this, let's workaround
+    # it by explicitly -l linking all libraries needed in tests.
     if "stdlib_lto" in config.available_features:
         for library in ["swiftCore", "swiftStdlibUnittest",
                         "swiftSwiftPrivateLibcExtras", "swiftSwiftPrivate",