buildroot

Update github hashes

It seems github now sometimes provides slightly changed tarballs which
produce a different sha256 hash than before. This commit fixes the
hashes of the packages when sources.buildroot.net does not store a copy
of the tarball matching the current hash.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>