Add a case in SymbolFile{Native,}PDB::TranslateLanguage for Swift

[lanza]

Summary

Requires: https://reviews.llvm.org/D59229

[compnerd]

CC: @zturner

[lanza]

rebase

source/Plugins/SymbolFile/NativePDB/SymbolFileNativePDB.cpp

 using namespace llvm::pdb;
 
 static lldb::LanguageType TranslateLanguage(PDB_Lang lang) {
   switch (lang) {
   case PDB_Lang::Cpp:
     return lldb::LanguageType::eLanguageTypeC_plus_plus;
   case PDB_Lang::C:
     return lldb::LanguageType::eLanguageTypeC;
+  case PDB_Lang::Swift:
+    return lldb::LanguageType::eLanguageTypeSwift;
   default:
     return lldb::LanguageType::eLanguageTypeUnknown;
   }
 }
 
 static std::unique_ptr<PDBFile> loadPDBFile(std::string PdbPath,
                                             llvm::BumpPtrAllocator &Allocator) {
   llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> ErrorOrBuffer =

source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp

 
 namespace {
 lldb::LanguageType TranslateLanguage(PDB_Lang lang) {
   switch (lang) {
   case PDB_Lang::Cpp:
     return lldb::LanguageType::eLanguageTypeC_plus_plus;
   case PDB_Lang::C:
     return lldb::LanguageType::eLanguageTypeC;
+  case PDB_Lang::Swift:
+    return lldb::LanguageType::eLanguageTypeSwift;
   default:
     return lldb::LanguageType::eLanguageTypeUnknown;
   }
 }
 
 bool ShouldAddLine(uint32_t requested_line, uint32_t actual_line,
                    uint32_t addr_length) {
   return ((requested_line == 0 || actual_line == requested_line) &&