kconfig: debug: experimental settings now uses select EXPERIMENTAL

With the introduction of `EXPERIMENTAL` and `WARN_EXPERIMENTAL` in
Zephyr all subsys/debug settings having `[EXPERIMENTAL]` in their
prompt has has been updated to include `select EXPERIMENTAL` so that
developers can enable warnings when experimental features are enabled.

Signed-off-by: Torsten Rasmussen <[email protected]>

Author: tejlmand

subsys/debug/Kconfig

@@ -343,6 +343,7 @@ endmenu
 config GDBSTUB
 	bool "GDB remote serial protocol support [EXPERIMENTAL]"
 	depends on ARCH_HAS_GDBSTUB
+	select EXPERIMENTAL
 	help
 	  This option enable support the target using GDB, or any other
 	  application that supports GDB protocol.