guile: needs autorecof

It's patching configure.ac and triggering an automatic autoreconf which
doesn't end well. Fixes:
http://autobuild.buildroot.net/results/14f/14f502687f6344a85e67b37efe9b00b8c586a266/



Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>