[LLDB] Fix conditional to also support AccessLevel::Open

This fixes crashes in LLDB expression evaluation when calling virtual
Open functions.

rdar://147797657
(cherry picked from commit f4a0f4b)

Author: adrian-prantl

lib/IRGen/IRGenSIL.cpp

@@ -8398,7 +8398,7 @@ void IRGenSILFunction::visitClassMethodInst(swift::ClassMethodInst *i) {
   // debugger.
   bool shouldUseDispatchThunkIfInDebugger =
       !classDecl->getASTContext().LangOpts.DebuggerSupport ||
-      methodAccess == AccessLevel::Public;
+      methodAccess >= AccessLevel::Public;
   if (IGM.hasResilientMetadata(classDecl, ResilienceExpansion::Maximal) &&
       shouldUseDispatchThunkIfInDebugger) {
     shouldUseDispatchThunk = true;