libosmocore: [PATCH] Replace obsolete automake AM_CONFIG_HEADER.

[Sylvain Munaut]

Hi,

> I just setup a machine running ArchLinux which has a pretty recent
> automake/autoconf. libosmocore fails to build. Attached (trivial) patch
> fixes that. Someone with a really old toolchain/automake should check
> if it breaks setups we consider supported.

Merged.


Cheers,

    Sylvain