Meson emits a warning because we use options beginning with "build_":

    DEPRECATION: Option uses prefix "build_", which is reserved for Meson. This will become an error in the future.

Rename our options so that we don't use the Meson-reserved prefix.

Signed-off-by: Simon Ser <simon.ser@intel.com>
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>