[build] Add build knowledge of dynamic libraries

Bonnibel will now build dynamic libraries when they're dependencies for
non-statically linked modules. It will also copy those shared libraries
into the initrd image for programs being copied into the image.

assets/manifests/default.yaml

@@ -12,5 +12,5 @@ services:
 drivers:
   - drv.uart
   - drv.uefi_fb
-tools:
+libs:
   - ld.so