Mark the package as nonshared to build it in the target specific build
step 1 of the build bots instead of the architecture generic build step 2.
In the build step 2 it may be left out if we build it using a different
target.
Fixes: #16857
Link: https://github.com/openwrt/openwrt/pull/16859
Signed-off-by: Robert Marko <robimarko@gmail.com>
1a75174b9b