Use --export-table from the latest LLD (#316)

* Remove unused build.sh

* Don't use wasm-export-table anymore.

* Rebuild binaries.

* Fix build script.

polkadot/parachain/test-chains/build.sh

@@ -1,13 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-rm -rf ./target
-for i in */
-do
-  i=${i%/}
-  cd $i
-
-  RUSTFLAGS="-C link-arg=--import-memory" cargo +nightly build --target=wasm32-unknown-unknown --release --no-default-features
-  wasm-gc target/wasm32-unknown-unknown/release/$i.wasm ../../tests/res/$i.wasm
-  cd ..
-done