This patch adds stone support to 2nd_stage_small (-text
only, no space for -dialog).

build_stage2.sh: [2nd_stage_small changes only]
- create local/bin to serve as a mountpoint for initrd/bin
- do not copy wget and ip (using the initrd ones)
- copy the programs required by stone and mkreiserfs
- copy the stone files and create a head replacement script

linuxrc.c:
- mount (MS_BIND) initrd's bin under stage 2 /usr/local/bin
- fail if mount fails && /bin/gzip does not exist [= small]

linuxrc2.sh:
- display a different startup message if dialog is missing


git-svn-id: http://www.rocklinux.org/svn/rock-linux/trunk@1363 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc