Now that Sparc/Sparc64 backend is mostly usable, provide the same
linking defaults as other NetBSD targets, i.e. compiler_rt-in-libc and
libc++ as STL.

llvm-svn: 260616
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index d5e57b7c..a9d0e2c 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -8380,6 +8380,8 @@
     case llvm::Triple::ppc:
     case llvm::Triple::ppc64:
     case llvm::Triple::ppc64le:
+    case llvm::Triple::sparc:
+    case llvm::Triple::sparcv9:
     case llvm::Triple::x86:
     case llvm::Triple::x86_64:
       useLibgcc = false;