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/pcu/gen_links.sh b/pcu/gen_links.sh
index 4852981..06ed606 100755
--- a/pcu/gen_links.sh
+++ b/pcu/gen_links.sh
@@ -51,3 +51,5 @@
 FILES+="BSSGP_Emulation.ttcn Osmocom_Gb_Types.ttcn "
 FILES+="LLC_Templates.ttcn L3_Templates.ttcn L3_Common.ttcn "
 gen_links $DIR $FILES
+
+ignore_pp_results