ignore results of .ttcnpp files

Add another macro ignore_pp_results to gen_links.sh.inc and call from all
gen_links.sh files, to add results of *.ttcnpp files, i.e. generated *.ttcn
files, to .gitignore.

Change-Id: Ic7fb176226771212d7700dafaf27ac71f12a4a61
diff --git a/hlr/gen_links.sh b/hlr/gen_links.sh
index 391ef73..c265eb8 100755
--- a/hlr/gen_links.sh
+++ b/hlr/gen_links.sh
@@ -27,3 +27,5 @@
 FILES+="Osmocom_VTY_Functions.ttcn "
 
 gen_links $DIR $FILES
+
+ignore_pp_results