[lldb] Use llvm::Optional instead of std::optional

Author: JDevlieghere

lldb/include/lldb/Core/Section.h

@@ -102,9 +102,9 @@ class SectionList {
 
 struct JSONSection {
   std::string name;
-  std::optional<lldb::SectionType> type;
-  std::optional<uint64_t> address;
-  std::optional<uint64_t> size;
+  llvm::Optional<lldb::SectionType> type;
+  llvm::Optional<uint64_t> address;
+  llvm::Optional<uint64_t> size;
 };
 
 class Section : public std::enable_shared_from_this<Section>,

lldb/source/Plugins/ObjectFile/JSON/ObjectFileJSON.h

@@ -92,7 +92,7 @@ class ObjectFileJSON : public ObjectFile {
   struct Header {
     std::string triple;
     std::string uuid;
-    std::optional<ObjectFile::Type> type;
+    llvm::Optional<ObjectFile::Type> type;
   };
 
   struct Body {
@@ -104,7 +104,7 @@ class ObjectFileJSON : public ObjectFile {
   ArchSpec m_arch;
   UUID m_uuid;
   ObjectFile::Type m_type;
-  std::optional<uint64_t> m_size;
+  llvm::Optional<uint64_t> m_size;
   std::vector<JSONSymbol> m_symbols;
   std::vector<JSONSection> m_sections;