Fix build on Ubuntu 14.04

Apparently we cannot have nice things like c++14.

Author: benlangmuir

Package.swift

@@ -64,5 +64,5 @@ let package = Package(
       path: "lib/LLVMSupport"),
   ],
 
-  cxxLanguageStandard: .cxx14
+  cxxLanguageStandard: .cxx11
 )

include/indexstore/IndexStoreCXX.h

@@ -212,12 +212,15 @@ class IndexStore {
       return;
     }
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++14-extensions"
     auto fnPtr = new RawUnitEventHandler([handler, localLib=std::move(localLib)](
         indexstore_unit_event_notification_t evt_note) {
       if (auto lib = localLib.lock()) {
         handler(UnitEventNotification(evt_note, lib));
       }
     });
+#pragma clang diagnostic pop
     api().store_set_unit_event_handler_f(obj, fnPtr, event_handler, event_handler_finalizer);
   }
 

lib/Support/Logging.cpp

@@ -81,7 +81,7 @@ Logger::Level Logger::getLogLevelByNum(unsigned LevelNum) {
 }
 
 unsigned Logger::getCurrentLogLevelNum() {
-  switch (LoggingLevel) {
+  switch (LoggingLevel.load()) {
     case Level::None:
     case Level::Warning:
       return 0;