Return 130 instead of 2 when interrupted by Ctrl+C, fix #430

src/ninja.cc

@@ -1382,7 +1382,7 @@ int NinjaMain::RunBuild(int argc, char** argv, Status* status) {
   if (!builder.Build(&err)) {
     status->Info("build stopped: %s.", err.c_str());
     if (err.find("interrupted by user") != string::npos) {
-      return 2;
+      return 130;
     }
     return 1;
   }