ASB December 2017, update security string to 2017-12-01

Implemented patches:
======================================
Framework
CVE-2017-0870  A-62134807     High

Media framework
CVE-2017-0837  A-64340921 [2] High
CVE-2017-0873  A-63316255     High
CVE-2017-0874  A-63315932     High
CVE-2017-0879  A-65025028     High
CVE-2017-13148 A-65717533     High
CVE-2017-13149 A-65719872     High
CVE-2017-13150 A-38328132     High
CVE-2017-13151 A-63874456     Critical
CVE-2017-13152 A-62872384     Moderate
CVE-2017-13154 A-63666573     High

System
CVE-2017-13156 A-64211847     High
CVE-2017-13157 A-32990341     High
CVE-2017-13158 A-32879915     High
CVE-2017-13159 A-32879772     High

NOT implemented, because not relevant:
======================================
Framework
CVE-2017-0807  A-35056974     High     not publicly available
CVE-2017-0871  A-65281159     High     8.0

Media framework
CVE-2017-0872  A-65290323     Critical 7.0, 7.1.1, 7.1.2, 8.0
CVE-2017-0876  A-64964675     Critical 6.0
CVE-2017-0877  A-66372937     Critical 6.0
CVE-2017-0878  A-65186291     Critical 8.0
CVE-2017-0880  A-65646012 [2] High     7.0, 7.1.1, 7.1.2
CVE-2017-13153 A-65280854     High     8.0

System
CVE-2017-13160 A-37160362     Critical 7.0, 7.1.1, 7.1.2, 8.0

Change-Id: I48991cb1a22a620e150a2790965ea04fc577feb9