Allow users to specify -Wl,-native* multiple times if they please


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24392 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/gccld/gccld.cpp b/tools/gccld/gccld.cpp
index 5c0fbb9..bad4a9c 100644
--- a/tools/gccld/gccld.cpp
+++ b/tools/gccld/gccld.cpp
@@ -78,10 +78,10 @@
          cl::aliasopt(LinkAsLibrary));
 
   cl::opt<bool>
-  Native("native",
+  Native("native", cl::ZeroOrMore,
          cl::desc("Generate a native binary instead of a shell script"));
   cl::opt<bool>
-  NativeCBE("native-cbe",
+  NativeCBE("native-cbe", cl::ZeroOrMore,
             cl::desc("Generate a native binary with the C backend and GCC"));
 
   cl::opt<bool>