Change pack_firmware_image::EntryBlob behavior

Change pack_firmware_image::EntryBlob behavior

Old: Trim input file when it is larger than specified firmware section length

New: Raise exception when such thing happens

BUG=none
TEST=manual

$ cat > config <<EOF
OUTPUT='/dev/null'
SIZE=1024
ENTRIES = [
  EntryBlob(offset=0, length=1, name='', flags=0, path='../LICENSE')
]
EOF
$ ./pack_firmware_image config
Traceback (most recent call last):
  File "./pack_firmware_image", line 266, in <module>
    main()
  File "./pack_firmware_image", line 260, in main
    pack_firmware_image(env['ENTRIES'], env['OUTPUT'], env['SIZE'])
  File "./pack_firmware_image", line 227, in pack_firmware_image
    entry.Pack(firmware_image, entries)
  File "./pack_firmware_image", line 133, in Pack
    raise PackError('blob too large: %d > %d' % (size, self.length))
__main__.PackError: blob too large: 1566 > 1

Committed: http://chrome-svn/viewvc/chromeos?view=rev&revision=31b206f

[Tom Wai-Hong Tam, 2011-02-10 03:20:32]

LGTM