Clear dynamic_library_linker_flag in legacy_fields_migrator

RELNOTES: None.
PiperOrigin-RevId: 234748020
diff --git a/tools/migration/legacy_fields_migration_lib.py b/tools/migration/legacy_fields_migration_lib.py
index 88853f7..d97a070 100644
--- a/tools/migration/legacy_fields_migration_lib.py
+++ b/tools/migration/legacy_fields_migration_lib.py
@@ -298,6 +298,7 @@
     toolchain.ClearField("compiler_flag")
     toolchain.ClearField("cxx_flag")
     toolchain.ClearField("linker_flag")
+    toolchain.ClearField("dynamic_library_linker_flag")
     toolchain.ClearField("static_runtimes_filegroup")
     toolchain.ClearField("dynamic_runtimes_filegroup")
 
diff --git a/tools/migration/legacy_fields_migration_lib_test.py b/tools/migration/legacy_fields_migration_lib_test.py
index a00554c..45d2017 100644
--- a/tools/migration/legacy_fields_migration_lib_test.py
+++ b/tools/migration/legacy_fields_migration_lib_test.py
@@ -318,7 +318,7 @@
     """)
     migrate_legacy_fields(crosstool)
     output = crosstool.toolchain[0]
-    self.assertEqual(len(output.linker_flag), 0)
+    self.assertEqual(len(output.dynamic_library_linker_flag), 0)
     self.assertEqual(output.feature[0].name, "default_link_flags")
     self.assertEqual(output.feature[0].flag_set[0].action,
                      DYNAMIC_LIBRARY_LINK_ACTIONS)