newt: Fix mfg crash with generated linker scripts #189

Job	Run time
populate-targets	5s
newt dump (bleprph-nrf52840pdk, ubuntu-latest)	25s
newt dump (bleprph-nrf52840pdk, windows-latest)	1m 0s
newt dump (bleprph-nrf52840pdk, macos-latest)	29s
newt dump (boot-nrf52dk, ubuntu-latest)	22s
newt dump (boot-nrf52dk, windows-latest)	1m 43s
newt dump (boot-nrf52dk, macos-latest)	28s
newt dump (btshell-nrf52840pdk, ubuntu-latest)	24s
newt dump (btshell-nrf52840pdk, windows-latest)	1m 49s
newt dump (btshell-nrf52840pdk, macos-latest)	28s
newt dump (btshell-nrf52dk, ubuntu-latest)	21s
newt dump (btshell-nrf52dk, windows-latest)	1m 46s
newt dump (btshell-nrf52dk, macos-latest)	26s
newt dump (my_blinky_sim, ubuntu-latest)	20s
newt dump (my_blinky_sim, windows-latest)	1m 3s
newt dump (my_blinky_sim, macos-latest)	36s
	11m 45s

Provide feedback