Fix RPM spec file (.so.6 -> .so.9)

Change-Id: I987757d8b8fa3908b5b9d690ce7a5a67e2254546
diff --git a/contrib/libosmo-abis.spec.in b/contrib/libosmo-abis.spec.in
index 889c20a..d010099 100644
--- a/contrib/libosmo-abis.spec.in
+++ b/contrib/libosmo-abis.spec.in
@@ -127,7 +127,7 @@
 
 %files -n libosmoabis9
 %defattr(-,root,root)
-%_libdir/libosmoabis.so.6*
+%_libdir/libosmoabis.so.9*
 
 %files -n libosmoabis-devel
 %defattr(-,root,root)