glib2-2.54.3-4.15.1

- Add glib2-CVE-2019-12450.patch: Backport from commit d8f8f4d6
  to fix a file permissions issue  while copy (boo#1137001,
  CVE-2019-12450).

- Add patch submitted upstream to handle an UNKNOWN NM connectivity
  the same as a NONE value. This partly fixes boo#1103678
  (packagekit reports the network as available on a computer
  without network connectivity which makes plasma-pk-update start
  an update check which obviously fails).
  * 0001-Handle-an-UNKNOWN-NetworkManager-connectivity-as-NONE.patch

- Enable systemtap (fate#326393 bsc#1090047).

- Update to version 2.53.3:
  + Bugs fixed: bgo#658446, bgo#661926, bgo#674885, bgo#775593,
    bgo#776169, bgo#776333, bgo#776504, bgo#777307, bgo#778422,
    bgo#781301, bgo#782336, bgo#782996, bgo#783061, bgo#783130,
    bgo#783193, bgo#783201, bgo#783340, bgo#783350, bgo#783392,
    bgo#783593.
  + Updated translations.