Allow dumpstate to write shell files

Allow the bugreport service to create files in
/data/data/com.android.shell/files/bugreports/bugreport .

Addresses the following denials:

<5>[31778.629368] type=1400 audit(1388876199.162:230): avc:  denied  { write } for  pid=19092 comm="dumpstate" name="bugreports" dev="mmcblk0p28" ino=1565709 scontext=u:r:dumpstate:s0 tcontext=u:object_r:shell_data_file:s0 tclass=dir
<5>[31778.629493] type=1400 audit(1388876199.162:231): avc:  denied  { add_name } for  pid=19092 comm="dumpstate" name="bugreport-2014-01-04-14-56-39.txt.tmp" scontext=u:r:dumpstate:s0 tcontext=u:object_r:shell_data_file:s0 tclass=dir
<5>[31778.629622] type=1400 audit(1388876199.162:232): avc:  denied  { create } for  pid=19092 comm="dumpstate" name="bugreport-2014-01-04-14-56-39.txt.tmp" scontext=u:r:dumpstate:s0 tcontext=u:object_r:shell_data_file:s0 tclass=file
<5>[31778.629779] type=1400 audit(1388876199.162:233): avc:  denied  { write open } for  pid=19092 comm="dumpstate" name="bugreport-2014-01-04-14-56-39.txt.tmp" dev="mmcblk0p28" ino=1566628 scontext=u:r:dumpstate:s0 tcontext=u:object_r:shell_data_file:s0 tclass=file
<5>[31778.629977] type=1400 audit(1388876199.162:234): avc:  denied  { getattr } for  pid=19092 comm="dumpstate" path="/data/data/com.android.shell/files/bugreports/bugreport-2014-01-04-14-56-39.txt.tmp" dev="mmcblk0p28" ino=1566628 scontext=u:r:dumpstate:s0 tcontext=u:object_r:shell_data_file:s0 tclass=file

Change-Id: I080613e8a2c989a7b50fde914271967a814c4ff4

dumpstate.te

@@ -68,3 +68,8 @@ binder_call(dumpstate, appdomain)
 
 # Reading /proc/PID/maps of other processes
 allow dumpstate self:capability sys_ptrace;
+
+# Allow the bugreport service to create a file in
+# /data/data/com.android.shell/files/bugreports/bugreport
+allow dumpstate shell_data_file:dir rw_dir_perms;
+allow dumpstate shell_data_file:file create_file_perms;