More chapter 5 build scripts
	new file:   chapter_5/5_17_Bzip2-1.0.6.sh
	new file:   chapter_5/5_18_Coreutils-8.23.sh
	new file:   chapter_5/5_19_Diffutils-3.3.sh
	new file:   chapter_5/5_20_File-5.19.sh
	new file:   chapter_5/5_21_Findutils-4.4.2.sh
	new file:   chapter_5/5_22_Gawk-4.1.1.sh
	modified:   chapter_5/LFS_Chapter_5.sh