Add rbc version of soong_config_set_bool

    _soong_config_namespace(g, nsname)

    g[_soong_config_namespaces_key][nsname][var]=_mkstrip(value)

def _soong_config_set_bool(g, nsname, var, value):

    """Assigns the value to the variable in the namespace, and marks it as a boolean."""

    _soong_config_set(g, nsname, var, _filter("true", value))

    g["SOONG_CONFIG_TYPE_%s_%s" % (nsname, var)] = "bool"

def _soong_config_append(g, nsname, var, value):

    """Appends to the value of the variable in the namespace."""

    _soong_config_namespace(g, nsname)

    soong_config_namespace = _soong_config_namespace,

    soong_config_append = _soong_config_append,

    soong_config_set = _soong_config_set,

    soong_config_set_bool = _soong_config_set_bool,

    soong_config_get = _soong_config_get,

    abspath = _abspath,

    add_product_dex_preopt_module_config = _add_product_dex_preopt_module_config,