Bring back the unlabeled allowall rules

On an upgrade from 4.2 to tip-of-tree master, there are still a
number of files which aren't properly labeled. Restore the
unlabeled compat rules until we can get everything properly
labeled. It's not ideal, but it works around the immediate
problem.

After applying https://android-review.googlesource.com/94966 ,
I'm still seeing the following denials.

<4>[   12.040639] type=1400 audit(1400289656.430:4): avc:  denied  { read } for  pid=143 comm="installd" name="0" dev=mmcblk0p9 ino=32194 scontext=u:r:installd:s0 tcontext=u:object_r:unlabeled:s0 tclass=lnk_file
<4>[  168.289170] type=1400 audit(1400289812.680:5): avc:  denied  { getattr } for  pid=1079 comm="system_server" path="/data/data/com.android.backupconfirm" dev=mmcblk0p9 ino=112676 scontext=u:r:system_server:s0 tcontext=u:object_r:unlabeled:s0 tclass=dir
<4>[  169.088406] type=1400 audit(1400289813.480:6): avc:  denied  { read } for  pid=143 comm="installd" name="com.android.location.fused" dev=mmcblk0p9 ino=112720 scontext=u:r:installd:s0 tcontext=u:object_r:unlabeled:s0 tclass=dir
<4>[  169.088790] type=1400 audit(1400289813.480:7): avc:  denied  { open } for  pid=143 comm="installd" name="com.android.location.fused" dev=mmcblk0p9 ino=112720 scontext=u:r:installd:s0 tcontext=u:object_r:unlabeled:s0 tclass=dir
<4>[  169.089205] type=1400 audit(1400289813.480:8): avc:  denied  { write } for  pid=143 comm="installd" name="com.android.location.fused" dev=mmcblk0p9 ino=112720 scontext=u:r:installd:s0 tcontext=u:object_r:unlabeled:s0 tclass=dir
<4>[  169.089615] type=1400 audit(1400289813.480:9): avc:  denied  { remove_name } for  pid=143 comm="installd" name="lib" dev=mmcblk0p9 ino=112721 scontext=u:r:installd:s0 tcontext=u:object_r:unlabeled:s0 tclass=dir
<4>[  169.090024] type=1400 audit(1400289813.480:10): avc:  denied  { unlink } for  pid=143 comm="installd" name="lib" dev=mmcblk0p9 ino=112721 scontext=u:r:installd:s0 tcontext=u:object_r:unlabeled:s0 tclass=lnk_file
<4>[  169.090350] type=1400 audit(1400289813.480:11): avc:  denied  { rmdir } for  pid=143 comm="installd" name="com.android.renderscript.cache" dev=mmcblk0p9 ino=112902 scontext=u:r:installd:s0 tcontext=u:object_r:unlabeled:s0 tclass=dir
<4>[  171.875822] type=1400 audit(1400289816.260:12): avc:  denied  { unlink } for  pid=143 comm="installd" name="8882B60ADE91B9E4.toc" dev=mmcblk0p9 ino=112903 scontext=u:r:installd:s0 tcontext=u:object_r:unlabeled:s0 tclass=file
<4>[  180.615263] type=1400 audit(1400289825.000:13): avc:  denied  { rename } for  pid=143 comm="installd" name="BackupTransport.backupScheduler.xml" dev=mmcblk0p9 ino=112852 scontext=u:r:installd:s0 tcontext=u:object_r:unlabeled:s0 tclass=file
<4>[  180.615578] type=1400 audit(1400289825.000:14): avc:  denied  { setattr } for  pid=143 comm="installd" name="BackupTransport.backupScheduler.xml" dev=mmcblk0p9 ino=112852 scontext=u:r:installd:s0 tcontext=u:object_r:unlabeled:s0 tclass=file
<4>[  393.934310] type=1400 audit(1400290038.320:15): avc:  denied  { read } for  pid=2410 comm="d.process.acore" name="0" dev=mmcblk0p9 ino=32194 scontext=u:r:untrusted_app:s0 tcontext=u:object_r:unlabeled:s0 tclass=lnk_file
<4>[  399.370936] type=1400 audit(1400290043.760:16): avc:  denied  { read } for  pid=2998 comm="SharedPreferenc" name="BackupTransport.backupScheduler.xml" dev=mmcblk0p9 ino=112852 scontext=u:r:untrusted_app:s0 tcontext=u:object_r:unlabeled:s0 tclass=file
<4>[  399.371792] type=1400 audit(1400290043.760:17): avc:  denied  { getattr } for  pid=2998 comm="SharedPreferenc" path="/data/data/com.google.android.backuptransport/shared_prefs/BackupTransport.backupScheduler.xml" dev=mmcblk0p9 ino=112852 scontext=u:r:untrusted_app:s0 tcontext=u:object_r:unlabeled:s0 tclass=file
<4>[  399.372219] type=1400 audit(1400290043.760:18): avc:  denied  { open } for  pid=2998 comm="SharedPreferenc" name="BackupTransport.backupScheduler.xml" dev=mmcblk0p9 ino=112852 scontext=u:r:untrusted_app:s0 tcontext=u:object_r:unlabeled:s0 tclass=file

Change-Id: I65dcfa8e77a63cb61551a1010358f0e45956dbbf