Ignore a "generic" return value from getHostCPUName.  <rdar://problem/11314502>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156487 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 1ccba75..10964ec 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -958,7 +958,7 @@
       // FIXME: We should also incorporate the detected target features for use
       // with -native.
       std::string CPU = llvm::sys::getHostCPUName();
-      if (!CPU.empty())
+      if (!CPU.empty() && CPU != "generic")
         CPUName = Args.MakeArgString(CPU);
     } else
       CPUName = A->getValue(Args);