[lldb] Re-insert code to search for a binary by filepath if provided

July 14 2024 I landed a change to update progress reporting when
loading kernel/firmware binaries
https://github.com/llvm/llvm-project/pull/98845
In DynamicLoader::LoadBinaryWithUUIDAndAddress I removed code that
was setting the ModuleSpec to the provided name, if the name provided
is that of a file on disk.  With this code missing, if a filepath
name is passed in, this code will fail to find that binary on the local
disk.  There's nothing in the PR / intention that would lead to this
change, it was unintentional.

lldb/source/Core/DynamicLoader.cpp

@@ -229,6 +229,8 @@ ModuleSP DynamicLoader::LoadBinaryWithUUIDAndAddress(
   ModuleSpec module_spec;
   module_spec.GetUUID() = uuid;
   FileSpec name_filespec(name);
+  if (FileSystem::Instance().Exists(name_filespec))
+    module_spec.GetFileSpec() = name_filespec;
 
   if (uuid.IsValid()) {
     Progress progress("Locating binary", prog_str.GetString().str());