Update Substrate, Polkadot and switch to wasm-builder

cumulus/scripts/build.sh

@@ -1,28 +0,0 @@
-#!/usr/bin/env bash
-
-# This script assumes that all pre-requisites are installed.
-
-set -e
-
-PROJECT_ROOT=`git rev-parse --show-toplevel`
-source `dirname "$0"`/common.sh
-
-export CARGO_INCREMENTAL=0
-
-# Save current directory.
-pushd .
-
-cd $ROOT
-
-for SRC in "${SRCS[@]}"
-do
-  echo "*** Building wasm binaries in $SRC"
-  cd "$PROJECT_ROOT/$SRC"
-
-  ./build.sh
-
-  cd - >> /dev/null
-done
-
-# Restore initial directory.
-popd

cumulus/scripts/common.sh

@@ -1,18 +0,0 @@
-#!/usr/bin/env bash
-
-ROOT=`dirname "$0"`
-
-# A list of directories which contain wasm projects.
-SRCS=(
-	"test/runtime/wasm"
-)
-
-# Make pushd/popd silent.
-
-pushd () {
-	command pushd "$@" > /dev/null
-}
-
-popd () {
-	command popd "$@" > /dev/null
-}