Bump the required autoconf version to 2.62
Bump the required autoconf version to 2.62

This is required by the introspection macro

Distrotech/atk,GNOME/at-spi2-core,Distrotech/atk,collects/atk,Distrotech/atk,GNOME/at-spi2-core,collects/atk,GNOME/at-spi2-core