filter-branch: add passed/remaining seconds on progress
filter-branch: add passed/remaining seconds on progress

adds seconds progress and estimated seconds time if getting the current
timestamp is supported by the date +%s command

Signed-off-by: Gabor Bernat <361ac88513f26d482b03fdfae0b30a777813a983@gravityrd.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git