1. change some directory structure for the build script

2. add build script and document
   see DOC/BuildVentoyFromSource.txt for detail

DOC/installdietlibc.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+if ! [ -f ./dietlibc-0.34.tar.xz ]; then
+    echo "No dietlibc-0.34.tar.xz found ..."
+    exit 1
+fi
+
+rm -rf /opt/diet32
+rm -rf /opt/diet64
+
+tar -xvf dietlibc-0.34.tar.xz
+cd dietlibc-0.34
+
+prefix=/opt/diet64 make -j 4
+prefix=/opt/diet64 make install 2>/dev/null
+
+cd ..
+rm -rf dietlibc-0.34
+
+tar -xvf dietlibc-0.34.tar.xz
+cd dietlibc-0.34
+
+sed "s/MYARCH:=.*/MYARCH=i386/" -i Makefile
+sed "s/CC=gcc/CC=gcc -m32/" -i Makefile
+
+prefix=/opt/diet32 make -j 4
+prefix=/opt/diet32 make install 2>/dev/null
+
+cd ..
+rm -rf dietlibc-0.34
+
+echo ""
+echo " ================ success ==============="
+echo ""