dropwatch requires thread support because it selects libnl that
depends on thread support. Also dropwatch cannot build on AArch64,
because it selects the target binutils package which isn't (yet)
available on AArch64.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
[Peter: fix help text & license, needs host-pkgconf]
Signed-off-by: Tzu-Jung Lee <tjlee@ambarella.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
