[lldb] Update DWARFASTParser references to use new plugin::dwarf namespace

(cherry picked from commit 78598ae)

Author: bnbarham

lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h

@@ -41,6 +41,7 @@
 #include "UniqueDWARFASTType.h"
 
 class DWARFASTParserClang;
+class DWARFASTParserSwift;
 
 namespace llvm {
 class DWARFDebugAbbrev;

lldb/source/Plugins/TypeSystem/Swift/SwiftASTContext.h

@@ -77,11 +77,16 @@ namespace llvm {
 class LLVMContext;
 }
 
-class DWARFASTParser;
 class SwiftEnumDescriptor;
 
 namespace lldb_private {
 
+namespace plugin {
+namespace dwarf {
+class DWARFASTParser;
+} // namespace dwarf
+} // namespace plugin
+
 struct SourceModule;
 class SwiftASTContext;
 class ClangExternalASTSourceCallbacks;
@@ -549,7 +554,7 @@ class SwiftASTContext : public TypeSystemSwift {
 
   bool IsFixedSize(CompilerType compiler_type);
 
-  DWARFASTParser *GetDWARFParser() override;
+  plugin::dwarf::DWARFASTParser *GetDWARFParser() override;
 
   // CompilerDecl functions
   ConstString DeclGetName(void *opaque_decl) override {

lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.h

@@ -109,7 +109,7 @@ class TypeSystemSwiftTypeRef : public TypeSystemSwift {
   Status IsCompatible() override;
 
   void DiagnoseWarnings(Process &process, Module &module) const override;
-  DWARFASTParser *GetDWARFParser() override;
+  plugin::dwarf::DWARFASTParser *GetDWARFParser() override;
   // CompilerDecl functions
   ConstString DeclGetName(void *opaque_decl) override {
     return ConstString("");
@@ -496,7 +496,7 @@ class TypeSystemSwiftTypeRef : public TypeSystemSwift {
   mutable std::unique_ptr<SwiftDWARFImporterForClangTypes>
       m_dwarf_importer_for_clang_types_up;
   mutable std::unique_ptr<ClangNameImporter> m_name_importer_up;
-  std::unique_ptr<DWARFASTParser> m_dwarf_ast_parser_up;
+  std::unique_ptr<plugin::dwarf::DWARFASTParser> m_dwarf_ast_parser_up;
 
   /// The APINotesManager responsible for each Clang module.
   llvm::DenseMap<clang::Module *,