build: Fix the build with automake 1.13
build: Fix the build with automake 1.13

In Automake 1.13, the long-deprecated macro AM_CONFIG_HEADER (deprecated
since 2002) has been removed in favour of AC_CONFIG_HEADERS.

https://bugzilla.gnome.org/show_bug.cgi?id=692118

GNOME/grilo,kyoushuu/grilo,kyoushuu/grilo,GNOME/grilo,MathieuDuponchelle/grilo,MathieuDuponchelle/grilo,grilofw/grilo,grilofw/grilo,grilofw/grilo,jasuarez/grilo,jasuarez/grilo,jasuarez/grilo,MathieuDuponchelle/grilo,kyoushuu/grilo,kyoushuu/grilo