[lldb] Implement a formatter bytecode interpreter in C++

Compared to the python version, this also does type checking and error
handling, so it's slightly longer, however, it's still comfortably
under 500 lines.

lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp

@@ -1697,6 +1697,7 @@ static SectionType GetSectionTypeFromName(llvm::StringRef Name) {
       .Case(".gosymtab", eSectionTypeGoSymtab)
       .Case(".text", eSectionTypeCode)
       .Case(".lldbsummaries", lldb::eSectionTypeLLDBTypeSummaries)
+      .Case(".lldbformatters", lldb::eSectionTypeLLDBFormatters)
       .Case(".swift_ast", eSectionTypeSwiftModules)
       .Default(eSectionTypeOther);
 }