[Driver] BuildOffloadingActions: Stabilize iteration order

Otherwise hip-phases.hip could fail when llvm::hash_value(StringRef)
changes.

Author: MaskRay

clang/lib/Driver/Driver.cpp

@@ -4595,6 +4595,7 @@ Action *Driver::BuildOffloadingActions(Compilation &C,
     for (const ToolChain *TC : ToolChains)
       for (StringRef Arch : getOffloadArchs(C, Args, Kind, TC))
         TCAndArchs.push_back(std::make_pair(TC, Arch));
+    llvm::sort(TCAndArchs, llvm::less_second());
 
     for (unsigned I = 0, E = TCAndArchs.size(); I != E; ++I)
       DeviceActions.push_back(C.MakeAction<InputAction>(*InputArg, InputType));