[Buildroot] Warnings with GCC 7

[Wolfgang Grandegger]

Hallo,

for my build of my "x86_64" Buildroot BSP I switched the GCC version from
6 to 7. Since then I get a lot of the following warning messages:

Warning: host file "./lib/gcc/x86_64-buildroot-linux-gnu/7.3.0/plugin/include/gensupport.h" is touched by more than one package: [u'host-gcc-initial', u'host-gcc-final']

Is it something serious? Am I doing something wrong?
I use Buildroot version 2018.02.3.

Thanks,

Wolfgang.