Label /data/asan/* libs as system_lib_file.

This patch gives global access to asan libraries. This is not ideal since the
labeling is not symmetric with standard locations, but this approach is easy to
maintain.

Fixes: 117555408
Test: processes on asan builds load /data/asan/* libs correctly
Change-Id: If54558c1808d8b16e06073c150c9f3eb358dda67

private/file_contexts_asan

-/data/asan/system/lib(/.*)?                u:object_r:system_file:s0
-/data/asan/system/lib64(/.*)?              u:object_r:system_file:s0
-/data/asan/vendor/lib(/.*)?                u:object_r:system_file:s0
-/data/asan/vendor/lib64(/.*)?              u:object_r:system_file:s0
-/data/asan/odm/lib(/.*)?                   u:object_r:system_file:s0
-/data/asan/odm/lib64(/.*)?                 u:object_r:system_file:s0
+/data/asan/system/lib(/.*)?                u:object_r:system_lib_file:s0
+/data/asan/system/lib64(/.*)?              u:object_r:system_lib_file:s0
+/data/asan/vendor/lib(/.*)?                u:object_r:system_lib_file:s0
+/data/asan/vendor/lib64(/.*)?              u:object_r:system_lib_file:s0
+/data/asan/odm/lib(/.*)?                   u:object_r:system_lib_file:s0
+/data/asan/odm/lib64(/.*)?                 u:object_r:system_lib_file:s0
 /system/asan.options           u:object_r:system_asan_options_file:s0
 /system/bin/asan_extract       u:object_r:asan_extract_exec:s0
 /system/bin/asanwrapper        u:object_r:asanwrapper_exec:s0