configure.ac: Add -Wno-portability to AM_INIT_AUTOMAKE to suppress automake >= 1.10 warnings
configure.ac: Add -Wno-portability to AM_INIT_AUTOMAKE to suppress automake >= 1.10 warnings

svn path=/trunk/; revision=675

GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets,Distrotech/telepathy-account-widgets