Update the example to show that an archive can contain llvm bitcode.

llvm-svn: 75000

Author: espindola

llvm/docs/GoldPlugin.html

@@ -127,8 +127,9 @@
 
 --- command lines ---
 $ llvm-gcc -flto a.c -c -o a.o              # <-- a.o is LLVM bitcode file
+$ ar q a.a a.o                              # <-- a.a is an archive with LLVM bitcode
 $ llvm-gcc b.c -c -o b.o                    # <-- b.o is native object file
-$ llvm-gcc -use-gold-plugin a.o b.o -o main # <-- link with LLVMgold plugin
+$ llvm-gcc -use-gold-plugin a.a b.o -o main # <-- link with LLVMgold plugin
 </pre>
   <p>Gold informs the plugin that foo3 is never referenced outside the IR,
   leading LLVM to delete that function. However, unlike in the