reduce fraction of progress bar for verification
reduce fraction of progress bar for verification

Reduce the fraction of the progress bar used for package verification
from 50% to 25%:
  - verification is faster than before due to sha1 improvements
  - in eclair we're now verifying the compressed data rather than
    decompressing it
  - incremental packages (which is what most installs use) write more
    data than is contained in the package.

InsomniaAOSP/platform_bootable_recovery,kylinmoddev/android_bootable_recovery,DerTeufel/dualboot_recovery,randomblame/bootable_recovery,kylinmoddev/android_bootable_recovery,DerTeufel/dualboot_recovery,InsomniaAOSP/platform_bootable_recovery,76Demented/bootable_recovery-,DerTeufel/dualboot_recovery,InsomniaAOSP/platform_bootable_recovery,Plain-Andy/android_platform_bootable_recovery,randomblame/bootable_recovery,randomblame/bootable_recovery,randomblame/bootable_recovery,Plain-Andy/android_platform_bootable_recovery,76Demented/bootable_recovery-,kylinmoddev/android_bootable_recovery,kylinmoddev/android_bootable_recovery,Plain-Andy/android_platform_bootable_recovery,76Demented/bootable_recovery-,Plain-Andy/android_platform_bootable_recovery,76Demented/bootable_recovery-,DerTeufel/dualboot_recovery,randomblame/bootable_recovery,DerTeufel/dualboot_recovery,InsomniaAOSP/platform_bootable_recovery,76Demented/bootable_recovery-,InsomniaAOSP/platform_bootable_recovery