fix warning: Potential leak of memory pointed to by 'target'

Bug: None
Test: The warning is gone.
Change-Id: I013fad1d53b37ae3d89846c70f0b10a67a9d04bb

tools/bit/main.cpp

@@ -455,6 +455,7 @@ parse_args(Options* options, int argc, const char** argv)
                 fprintf(stderr, "Test / activity supplied without a module to build: %s\n",
                         arg.c_str());
                 print_usage(stderr);
+                delete target;
                 exit(1);
             } else if (colonPos == string::npos) {
                 target->name = arg;