Enable debug info serialization by default

Author: usama54321

include/swift/Frontend/FrontendOptions.h

@@ -125,7 +125,7 @@ class FrontendOptions {
   /// Include local definitions/references in the index data.
   bool IndexIncludeLocals = false;
 
-  bool SerializeDebugInfoSIL = false;
+  bool SerializeDebugInfoSIL = true;
   /// If building a module from interface, ignore compiler flags
   /// specified in the swiftinterface.
   bool ExplicitInterfaceBuild = false;

include/swift/Serialization/SerializationOptions.h

@@ -151,7 +151,7 @@ namespace swift {
 
     bool AutolinkForceLoad = false;
     bool SerializeAllSIL = false;
-    bool SerializeDebugInfoSIL = false;
+    bool SerializeDebugInfoSIL = true;
     bool SerializeOptionsForDebugging = false;
     bool IsSIB = false;
     bool DisableCrossModuleIncrementalInfo = false;