libcap-ng-bin: add test-version.sh to skip version check

captest, filecap, netcap and pscap (libcap-ng-bin) do not print the
package version string (0.8.4), causing generic version check failures
in CI.

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>

libs/libcap-ng/test-version.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+case "$1" in
+captest|filecap|netcap|pscap) exit 0 ;;
+*) echo "Untested package: $1" >&2; exit 1 ;;
+esac