[Serialization] Add the STRICT_MEMORY_SAFETY record type.

Author: DougGregor

lib/Serialization/Serialization.cpp

@@ -862,6 +862,7 @@ void Serializer::writeBlockInfoBlock() {
   BLOCK_RECORD(options_block, HAS_CXX_INTEROPERABILITY_ENABLED);
   BLOCK_RECORD(options_block, ALLOW_NON_RESILIENT_ACCESS);
   BLOCK_RECORD(options_block, SERIALIZE_PACKAGE_ENABLED);
+  BLOCK_RECORD(options_block, STRICT_MEMORY_SAFETY);
   BLOCK_RECORD(options_block, CXX_STDLIB_KIND);
   BLOCK_RECORD(options_block, PUBLIC_MODULE_NAME);
   BLOCK_RECORD(options_block, SWIFT_INTERFACE_COMPILER_VERSION);