buildroot

sysvinit: arm64 build fix

sysvinit was not able to be built for arm64 architectures.
The package patch was changed according to the suggestion of
Thomas Petazzoni.

Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>