add .empty files for git-svn

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.

1 files changed, 0 insertions, 0 deletions

diff --git a/target/u-boot/2008.10/.empty b/target/u-boot/2008.10/.empty
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/target/u-boot/2008.10/.empty