debian: Split libosmo-sabp from libosmo-ranap package

Related: OS#4342
Change-Id: I936220e95a3334d8052bb2c52fbf335a8a5c3711
diff --git a/debian/libosmo-sabp-dev.install b/debian/libosmo-sabp-dev.install
new file mode 100644
index 0000000..7e8594c
--- /dev/null
+++ b/debian/libosmo-sabp-dev.install
@@ -0,0 +1,3 @@
+usr/include/osmocom/sabp
+usr/lib/*/libosmo-sabp.so
+usr/lib/*/pkgconfig/libosmo-sabp.pc