crosutils: refine memento image / factory package creation

crosutils: refine memento image / factory package creation

This CL improves creation of memento / factory image payload by:
 - verbose progress report
 - allowing to compress by pigz, the parallel version of gzip
 - prevents unpacking entire image if partition tools (cgpt/parted)
   is available.

BUG=chromium-os:6536, chromium-os:5208
TEST=Verified executing "time ./make_factory_package.sh ..." for ToT factory bundle:
 - before this CL (memento gzip param is not -9): 3m53.126s
 - after this CL, without pigz, with cgpt: 2m34.897s
 - after this CL, with pigz+cgpt, memento_gz=-9: 0m45.603s
 - after this CL, with pigz, without cgpt/parted, memento_gz=-9: 1m49.748s
 Also verified such bundle can be installed on a real netbook device.

Change-Id: Ie182844ea5482d6d321b9549fa584377edf7dfe3

Committed: http://chrome-svn/viewvc/chromeos?view=rev&revision=51484a9

[Hung-Te, 2010-11-12 15:31:22]

for max speed, please install pigz in your platform first, by "sudo apt-get
install pigz" outside chroot, and "emerge pigz" inside chroot.

[Nick Sanders, 2010-11-12 17:55:46]

lgtm, looks great!

[Nick Sanders, 2010-11-12 18:05:41]

http://codereview.chromium.org/4824003/diff/1/make_factory_package.sh
File make_factory_package.sh (right):

http://codereview.chromium.org/4824003/diff/1/make_factory_package.sh#newcode159
make_factory_package.sh:159: if ! has_part_tools; then
FYI You can avoid running unpack partitions with code similar to this: 
(not necessary for this CL)

# stream_parition chromium.bin KERN-A
# dump partition with the specified GPT name to stdout
stream_partition() {
  binfile=$1
  name=$2
  offset=$(cat unpack_partitions.sh | grep Label | sed "s/#//" | grep  "${name}"
| awk '{ print $1}')
  length=$(cat unpack_partitions.sh | grep Label | sed "s/#//" | grep  "${name}"
| awk '{ print $2}')

  dd if="${binfile}" bs=512 skip="${offset}" count="${length}" 2> /dev/null
}

[sosa, 2010-11-12 19:08:20]

Can you move image_common.sh to lib?  We're slowly trying to move executables
into bin and lib's into lib (src/scripts/lib)