[Hexagon] Use integrated assembler by default

llvm-svn: 255127
diff --git a/clang/lib/Driver/ToolChains.h b/clang/lib/Driver/ToolChains.h
index fc656af..ceb61ca 100644
--- a/clang/lib/Driver/ToolChains.h
+++ b/clang/lib/Driver/ToolChains.h
@@ -871,6 +871,9 @@
   CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
 
   StringRef GetGCCLibAndIncVersion() const { return GCCLibAndIncVersion.Text; }
+  bool IsIntegratedAssemblerDefault() const override {
+    return true;
+  }
 
   std::string GetGnuDir(const std::string &InstalledDir,
                         const llvm::opt::ArgList &Args) const;