SDK: make sure to include libosmo-abis, libdbi and libgtp headers

This enables the SDK to do a full openbsc build.
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 e9f9995..b591b66 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 = "r1"
+PR = "r2"
 
 ALLOW_EMPTY = "1"
 
diff --git a/recipes-osmocom/tasks/task-sdk-osmo.inc b/recipes-osmocom/tasks/task-sdk-osmo.inc
index 45c37c7..0eac22a 100644
--- a/recipes-osmocom/tasks/task-sdk-osmo.inc
+++ b/recipes-osmocom/tasks/task-sdk-osmo.inc
@@ -1,6 +1,9 @@
 SDK-OSMO = " \
     libosmocore-dev \
     libosmo-sccp-dev \
+    libosmo-abis-dev \
+    libgtp-dev \
+    libdbi-dev \
     "
 
 SDK-EXTRAS ?= ""