Add PNaClSjLjEH pass to implement C++ exception handling using setjmp()+longjmp()

tools/opt/opt.cpp

Index: tools/opt/opt.cpp
diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index e0ea24a9d8fa98039d262ee081403e4f7c3a9bd8..f13ba04229d0ca8348c4aeeaa0f476c4b55e18cb 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -629,6 +629,7 @@ int main(int argc, char **argv) {
   initializeInsertDivideCheckPass(Registry);
   initializePNaClABIVerifyFunctionsPass(Registry);
   initializePNaClABIVerifyModulePass(Registry);
+  initializePNaClSjLjEHPass(Registry);
   initializePromoteI1OpsPass(Registry);
   initializePromoteIntegersPass(Registry);
   initializeRemoveAsmMemoryPass(Registry);