Added building helper scripts

build/01_init.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+p=$(dirname "$0")
+apk update && apk add bash
+"$p"/install_deps_alpine.sh

build/02_install_build_compiler.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+if [ $# -ne 1 ];then
+    echo "Missing arch"
+    exit 1
+fi
+ARCH="${1,,}"
+case $ARCH in
+    x86|x86_64|i686|arm|armhf|aarch64)
+    ARCH="${ARCH}-linux-musl"
+    ;;
+    *)
+    echo "Invalid arch ${ARCH}"
+    exit 1
+    ;;
+esac
+HOST=http://musl.cc
+cd /
+curl -so ${ARCH}-cross.tgz ${HOST}/${ARCH}-cross.tgz
+tar -xf ${ARCH}-cross.tgz 
+rm ${ARCH}-cross.tgz