Not buildable with lcc compiler in e2k

[mikhailnov]

DEBUG: lcc: "/builddir/build/BUILD/tdesktop-4.3.0-full/Telegram/ThirdParty/tgcalls/tgcalls/v2_4_0_0/InstanceV2_4_0_0Impl.cpp", line 1259: error #1563:
DEBUG:           class type not suitable for use with designators
DEBUG:                   .stateUpdated = [threads, weak](const NativeNetworkingImpl::State &state) {
DEBUG:                    ^

Also lcc prints tons of warning for tgcalls code, full build log: https://file-store.rosalinux.ru/api/v1/file_stores/20e63bbf051fc54479b83b79c7bfd4919fc12c01.log?show=true Maybe they will be useful for improving code.