keypad boot init overhaul: handle initially held-down keys This change fixes two previous behavioural defects: 1) On Compal phones, the PWR key had to be released before the boot sequence would proceed at all - it was stuck in an endless IRQ loop at the point of Nucleus enabling interrupts, before anything else. 2) On both Compal and sane platforms including Luna, if some regular non-PWR key was held down at boot time, the boot sequence would proceed and complete normally, but all non-PWR keypad buttons would be dead for the remainder of that boot cycle. The fix is a generic solution - no Compal-specific hack ended up being needed for the special case of their idiotic PWON-to-ROW4 hw wiring.

########################################
# LIBRARIES / MODULES definition       #
########################################

# to avoid multiple nucleus.def (import + include) 
ifndef NUCLEUS_DEF
   NUCLEUS_DEF = 1

### Nucleus libraries
###########################

  ifeq ($(OP_L1_STANDALONE),1)
    OUT_OS_LIB_DIR = $(OUT_LIB_DIR)
  endif

  export OS_FLASH_LIB     = $(OUT_OS_LIB_DIR)/nucleus_flash.lib
  export OS_INT_RAM_LIB   = $(OUT_OS_LIB_DIR)/nucleus_int_ram.lib
  export OS_LIB          := $(OS_FLASH_LIB) $(OS_INT_RAM_LIB)

  MODULES     += $(OS_NUC_DIR)

endif