Bug 691263 - Build with automake-1.13 broken
Bug 691263 - Build with automake-1.13 broken

Replace long obsolete AM_CONFIG_HEADER with proper AC_CONFIG_HEADERS.
automake-1.13 errors out upon seeing former.

Signed-off-by: Marko Lindqvist <09de095ce3e68c59408f3e8a648405bbea619591@gmail.com>

danny-ku/pango,Distrotech/pango,danny-ku/pango,kari-lentz/alpha-pango,Distrotech/pango,kari-lentz/alpha-pango,kari-lentz/alpha-pango,kari-lentz/alpha-pango,danny-ku/pango,Distrotech/pango