We add a simple test to cover the case of invoking
IRQ lock()/unlock() from ARM Cortex-M user mode.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit adds a new test suite in tests/arch/arm that
intends to testing system faults inside interrupts.
Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>