[lldb] Load embedded type summary section (#7859) (#8040)

Add support for type summaries embedded into the binary.

These embedded summaries will typically be generated by Swift macros,
but can also be generated by any other means.

rdar://115184658

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

@@ -1696,6 +1696,7 @@ static SectionType GetSectionTypeFromName(llvm::StringRef Name) {
       .Case(".gnu_debugaltlink", eSectionTypeDWARFGNUDebugAltLink)
       .Case(".gosymtab", eSectionTypeGoSymtab)
       .Case(".text", eSectionTypeCode)
+      .Case(".lldbsummaries", lldb::eSectionTypeLLDBTypeSummaries)
       .Case(".swift_ast", eSectionTypeSwiftModules)
       .Default(eSectionTypeOther);
 }