ASB May 2017, version string to 2017-05-01

Implemented patches:
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CVE-2017-0587 A-35219737 Critical
CVE-2017-0588 A-34618607 Critical
CVE-2017-0589 A-34897036 Critical
CVE-2017-0590 A-35039946 Critical
CVE-2017-0591 A-34097672 Critical
CVE-2017-0593 A-34114230 High
CVE-2017-0594 A-34617444 High
CVE-2017-0595 A-34705519 High
CVE-2017-0596 A-34749392 High
CVE-2017-0597 A-34749571 High
CVE-2017-0598 A-34128677 High
CVE-2017-0599 A-34672748 High
CVE-2017-0600 A-35269635 High
CVE-2017-0602 A-34946955 Moderate
CVE-2017-0603 A-35763994 Moderate
CVE-2015-7555 A-34697653 Critical 

Not applicable for Android 6 in general (according ASB):
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CVE-2017-0493 A-32793550 Moderate
CVE-2017-0601 A-35258579 Moderate
CVE-2017-0635 A-35467107 Low

Not applicable for LOS 13.0 specifically:
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CVE-2017-0592 A-34970788 Critical

Deferred (see topic boringssl-asb-2017.05):
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CVE-2016-7056 A-33752052 Moderate

Change-Id: Ibc5afa03077a935ed2ffd91659ec172c8a2ed54e