Fix GitHub binary preparation script for packaging (#399)
Fix GitHub binary preparation script for packaging (#399)

Update the prepare-binaries-for-github-release.py script to use the
correct directory name for input artifacts. Since #380, the directory
name has the pattern "$(PACKAGING)_$(TOOLCHAIN)_$(CONFIG)" (e.g.,
"app_pnacl_Release"), meanwhile it used to be just
"$(TOOLCHAIN)_$(CONFIG)".
GoogleChromeLabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector,googlechromelabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector,GoogleChromeLabs/chromeos_smart_card_connector