libs: update jglobus to 2.0.6-rc8.d

Changelog for v2.0.6-rc7.d..2.0.6-rc8.d
    * [35fe1c1] Only cache CA's signing policy as not found after searching all
    * [3ae5c04] Avoid memory leak and stale information when scanning directorie

Target: master
Require-book: no
Require-notes: yes
(cherry picked from commit 7085fa21c3a2137c94984999ba046bb5ad59df02)
Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Merge pull request #811 from kofemann/update-jg2-2.6

libs: update jglobus to 2.0.6-rc8.d