Veryl doesn't emit package_scope

[nananapo]

config.veryl

package config {
    local XLEN: u32 = 32;
}

eei.veryl

package eei {
    local XLEN: u32 = config::XLEN;
}

eei.veryl is translated into

package core_eei;
    localparam int unsigned XLEN = XLEN;
endpackage

Veryl doesn't emit package scope when package parameter refers another same name package value.

[dalance]

This issue was fixed at #726 which changes visibility detection mechanism of emitter.