policycoreutils: free memory of allocated context in newrole

Found by scan-build.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>

policycoreutils/newrole/newrole.c

@@ -1239,6 +1239,7 @@ int main(int argc, char *argv[])
 		free(pw.pw_dir);
 		free(pw.pw_shell);
 		free(shell_argv0);
+		free(new_context);
 		return exit_code;
 	}