[driver] Don't try to generate diagnostic information for dsymutil crashes.
Part of rdar://13134273

llvm-svn: 174203
diff --git a/clang/lib/Driver/Tools.h b/clang/lib/Driver/Tools.h
index a2b3c07..f4aebd8 100644
--- a/clang/lib/Driver/Tools.h
+++ b/clang/lib/Driver/Tools.h
@@ -278,6 +278,7 @@
                                                "dsymutil", TC) {}
 
     virtual bool hasIntegratedCPP() const { return false; }
+    virtual bool isDsymutilJob() const { return true; }
 
     virtual void ConstructJob(Compilation &C, const JobAction &JA,
                               const InputInfo &Output,