Build OTA when boot image exists even without kernel or recovery fstab am: 73f01711

  ifeq ($(TARGET_PRODUCT),sdk)

    build_ota_package := false

  endif

  # A target without a kernel or recovery fstab may be one of the following:

  # - A generic target. In this case, the OTA package usually isn't built.

  #   PRODUCT_BUILD_GENERIC_OTA_PACKAGE may be set to true to force OTA package

  #   generation.

  # - A real device target, with TARGET_NO_KERNEL set to true and

  #   BOARD_PREBUILT_BOOTIMAGE set. In this case, it is valid to generate

  #   an OTA package.

  ifneq ($(PRODUCT_BUILD_GENERIC_OTA_PACKAGE),true)

    ifneq ($(filter generic%,$(TARGET_DEVICE)),)

      build_ota_package := false

    endif

    ifeq ($(INSTALLED_BOOTIMAGE_TARGET),)

      ifeq ($(TARGET_NO_KERNEL),true)

        build_ota_package := false

      endif

      ifeq ($(recovery_fstab),)

        build_ota_package := false

      endif

    endif # INSTALLED_BOOTIMAGE_TARGET == ""

  endif # PRODUCT_BUILD_GENERIC_OTA_PACKAGE

  # Set build_otatools_package, and allow opt-out below.