Merge pull request #280 from xushiwei/q

demo: try..catch

c/setjmp/demo/_code/try_catch.cpp

@@ -0,0 +1,10 @@
+extern "C" void throwCppException();
+
+int main() {
+    try {
+        throwCppException();
+    } catch (...) {
+        throw;
+    }
+    return 0;
+}

c/setjmp/demo/llgo.cfg

@@ -1,6 +1,7 @@
 {
     "cl": [
         "clang -emit-llvm -S -o demo.ll -c _code/demo.cpp",
+        "clang -emit-llvm -S -o _code/llgo_autogen.ll -c _code/try_catch.cpp",
         "llgen .",
         "rm llgo_autogen.lla; zip llgo_autogen.lla llgo_autogen.ll demo.ll",
     ]