lets not forget about c++!

llvm-svn: 72778
diff --git a/llvm/docs/GoldPlugin.html b/llvm/docs/GoldPlugin.html
index 845ea1c..6be5277 100644
--- a/llvm/docs/GoldPlugin.html
+++ b/llvm/docs/GoldPlugin.html
@@ -152,6 +152,7 @@
     binutils):
     <pre class="doc_code">
 export CC="$PREFIX/bin/llvm-gcc -use-gold-plugin"
+export CXX="$PREFIX/bin/llvm-g++ -use-gold-plugin"
 export AR="$PREFIX/bin/ar --plugin libLLVMgold.so"
 export NM="$PREFIX/bin/nm --plugin libLLVMgold.so"
 export RANLIB=/bin/true #ranlib is not needed, and doesn't support .bc files in .a