arch: e2k: fix OUTPUT_ARCH in ldscript
arch: e2k: fix OUTPUT_ARCH in ldscript

e3s arch isn't available anymore in modern compilers so replace it by
elbrus-v2, as Embox only targets Monocube at this point

embox/embox,embox/embox,embox/embox,embox/embox,embox/embox,embox/embox