Add Breeze icon theme for use with KDE Plasma 5

Change-Id: I936d31300126e2ce000ea3a7cd70c8a2dec19502
Reviewed-on: https://gerrit.libreoffice.org/13043
Reviewed-by: Jan Holesovsky <kendy@collabora.com>
Tested-by: Jan Holesovsky <kendy@collabora.com>