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-core-standalone-osmo-sdk-target.bb b/recipes-osmocom/tasks/task-core-standalone-osmo-sdk-target.bb
index 83a571f..6eb5d21 100644
--- a/recipes-osmocom/tasks/task-core-standalone-osmo-sdk-target.bb
+++ b/recipes-osmocom/tasks/task-core-standalone-osmo-sdk-target.bb
@@ -6,7 +6,7 @@
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58 \
                     file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
-PR = "r4"
+PR = "r5"
 
 ALLOW_EMPTY_${PN} = "1"