sdk: Use the staticdev packet for libosmo-sccp

libosmo-sccp does not install any dynamically shared libraries
so let us install/depend on the staticdev package installing the
.a files and the -dev package.
diff --git a/recipes-osmocom/tasks/task-sdk-osmo.inc b/recipes-osmocom/tasks/task-sdk-osmo.inc
index 6f9ba8d..29f3ad9 100644
--- a/recipes-osmocom/tasks/task-sdk-osmo.inc
+++ b/recipes-osmocom/tasks/task-sdk-osmo.inc
@@ -1,6 +1,6 @@
 SDK-OSMO = " \
     libosmocore-dev \
-    libosmo-sccp-dev \
+    libosmo-sccp-staticdev \
     libosmo-abis-dev \
     libgtp-dev \
     libdbi-dev \