Exempt ASAN from selinux build-checks.

ASAN makes use of shenanigans that violate our policy best-practices.
This is by design.  Exempt them from these tests to get it building
again.

Bug: 37740897
Test: Builds with ASAN enabled.
Change-Id: Iffde28c2741466da5862b2dfe1fffa2c0d93caeb