add libsmpp32-dev and gpsd-dev to osmocom SDK/toolchain

libsmpp34 is needed for OsmoNITB SMPP support, and some of our systems
now run gpsd, thus people might wnat to compile applications against
libgps.
diff --git a/recipes-osmocom/tasks/task-sdk-osmo.inc b/recipes-osmocom/tasks/task-sdk-osmo.inc
index 0eac22a..6f9ba8d 100644
--- a/recipes-osmocom/tasks/task-sdk-osmo.inc
+++ b/recipes-osmocom/tasks/task-sdk-osmo.inc
@@ -4,6 +4,8 @@
     libosmo-abis-dev \
     libgtp-dev \
     libdbi-dev \
+    libsmpp34-dev \
+    gpsd-dev \
     "
 
 SDK-EXTRAS ?= ""