build: add g++-multilib linux-libc-dev:i386

README

@@ -12,7 +12,7 @@
 1. 首先装好 Ubuntu 64bit，推荐  Ubuntu  14 LTS x64
 
 2. 命令行输入 sudo apt-get update ，然后输入
-sudo apt-get -y install build-essential asciidoc binutils bzip2 gawk gettext git libncurses5-dev libz-dev patch python3 unzip zlib1g-dev lib32gcc1 libc6-dev-i386 subversion flex uglifyjs git-core gcc-multilib p7zip p7zip-full msmtp libssl-dev texinfo libglib2.0-dev xmlto qemu-utils upx libelf-dev autoconf automake libtool autopoint device-tree-compiler
+sudo apt-get -y install build-essential asciidoc binutils bzip2 gawk gettext git libncurses5-dev libz-dev patch python3 unzip zlib1g-dev lib32gcc1 libc6-dev-i386 subversion flex uglifyjs git-core gcc-multilib p7zip p7zip-full msmtp libssl-dev texinfo libglib2.0-dev xmlto qemu-utils upx libelf-dev autoconf automake libtool autopoint device-tree-compiler g++-multilib linux-libc-dev:i386
 
 3. git clone https://github.com/coolsnowwolf/lede 命令下载好源代码，然后 cd lede 进入目录