Allow executing parallel symbol dump and compatibilty check.

.github/generate_reports.sh

@@ -113,7 +113,7 @@ function build_and_dump
   cd "$INSTALL_FOLDER/lib"
   ls *.so | sed -e "s/^libpcl_//" -e "s/.so//" \
     | awk '{print "libpcl_"$1".so -o '"$ABI_DUMP_FOLDER"'/"$1".dump -lver '"$1"'"}' \
-    | xargs -n5 abi-dumper
+    | xargs -n5 -P${N_WORKERS} abi-dumper
 
   # Restore folder
   cd $PWD
@@ -133,4 +133,4 @@ NEW_ABI_DUMP_FOLDER="$ROOT_FOLDER/abi_dump/$NEW_VERSION_ESCAPED"
 cd "$ROOT_FOLDER"
 find $OLD_INSTALL_FOLDER/lib -name '*.so' -printf '%P\n' | sed -e "s/^libpcl_//" -e "s/.so//" \
     | awk '{print "-lib "$1" -old '"$OLD_ABI_DUMP_FOLDER"'/"$1".dump -new '"$NEW_ABI_DUMP_FOLDER"'/"$1".dump"}' \
-    | xargs -n6 abi-compliance-checker
+    | xargs -n6 -P${N_WORKERS} abi-compliance-checker