Extend sepolicy for SANITIZE_TARGET.

SANITIZE_TARGET adds shared libraries in /data/lib.

Bug: 21785137
Change-Id: I8ac3d059d88d57d24ed762ffc6202a4ce5a42333
diff --git a/file_contexts_asan b/file_contexts_asan
new file mode 100644
index 0000000..c125595
--- /dev/null
+++ b/file_contexts_asan
@@ -0,0 +1 @@
+/data/lib(/.*)?		u:object_r:system_file:s0