Fix for WatchDog not working for test app "monitoredService"
Fix for WatchDog not working for test app "monitoredService"

The problem is, that if the watchdog is built using "mkapp" for
a Linux target (e.g. wp76xx), then the config variable
LE_CONFIG_LINUX may not be imported, and as a result le_wdog.api
is included as "optional". This results in the failure of the
TryConnectService() call, and watchdog not being activated.
The fix is to invert the conditional compilation logic so that
even if the LE_CONFIG_LINUX is not set, the app still would include
the le_wdog.api correctly.

Resolves: LE-13515
Change-Id: Ia70d9083c9e51256d63598850629199793a17efe

legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af