[Driver] Move Lanai IAS enabling to Generic_GCC::IsIntegratedAssemblerDefault, NFC

[brad]

Summary

Move enabling of IAS back to Generic_GCC::IsIntegratedAssemblerDefault().

[MaskRay]

Looks great!

[jpienaar]

Thanks

clang/lib/Driver/ToolChains/Gnu.cpp

bool Generic_GCC::IsIntegratedAssemblerDefault() const {
   case llvm::Triple::aarch64_be:
   case llvm::Triple::arm:
   case llvm::Triple::armeb:
   case llvm::Triple::avr:
   case llvm::Triple::bpfel:
   case llvm::Triple::bpfeb:
   case llvm::Triple::csky:
   case llvm::Triple::hexagon:
+  case llvm::Triple::lanai:
   case llvm::Triple::m68k:
   case llvm::Triple::mips:
   case llvm::Triple::mipsel:
   case llvm::Triple::mips64:
   case llvm::Triple::mips64el:
   case llvm::Triple::msp430:
   case llvm::Triple::ppc:
   case llvm::Triple::ppcle:

clang/lib/Driver/ToolChains/Lanai.h

public:
 
   // No support for finding a C++ standard library yet.
   void addLibCxxIncludePaths(
       const llvm::opt::ArgList &DriverArgs,
       llvm::opt::ArgStringList &CC1Args) const override {}
   void addLibStdCxxIncludePaths(
       const llvm::opt::ArgList &DriverArgs,
       llvm::opt::ArgStringList &CC1Args) const override {}
-
-  bool IsIntegratedAssemblerDefault() const override { return true; }
 };
 
 } // end namespace toolchains
 } // end namespace driver
 } // end namespace clang
 
 #endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_LANAI_H