debug-optimize.inc: collect debug optimization tuning configuration

debug-optimize.inc: collect debug optimization tuning configuration

The modern compilers and code seem to require extra steps to avoid DEBUG errors,
Move debug tuning configuration from recipes to an include file to address these
errors.

Drop `:remove' operation on variable, override variables directly

Suggested-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>