Disable warnings as errors for STAGEautofeedback. Compilation during STAGEautofeedback produces additional warnings since inlining decisions with -fauto-profile are different from other builds. This patches disables warnings as errors for STAGEautofeedback. Tested on x86_64-pc-linux-gnu. * Makefile.tpl: Disable warnings as errors for STAGEautofeedback