Round-down years in "years+months" relative date view
Round-down years in "years+months" relative date view

Previously, a commit from 1 year and 7 months ago would display as
"2 years, 7 months ago".

Signed-off-by: David Reiss <6fea36cbb95d0d9800fb9224813d5738559b1144@facebook.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