Adjust default /etc/issue to print 'Welcome to Buildroot' like the
recently removed BR2_BANNER did, and adjust default hostname to be
'buildroot' instead of uclibc as we now support external glibc
toolchains as well.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
git-svn (and git) doesn't handle empty directories, so add .empty files
to those dirs like elsewhere in buildroot.
Those empty directories are normally not a big deal, but the recent changes
to u-boot broke the build.