swupdate: fix multilib build
swupdate: fix multilib build

Install paths are hard-coded into SWUpdate. Pass the install path for
libraries to be compliant with Multilib build.

Signed-off-by: Stefano Babic <2c2905e0c2877c7e4ce40c7425e972302953fda5@denx.de>

sbabic/meta-swupdate,sbabic/meta-swupdate